drivers/s390/scsi/zfcp_fsf.c

   1 /*
   2  *
   3  * linux/drivers/s390/scsi/zfcp_fsf.c
   4  *
   5  * FCP adapter driver for IBM eServer zSeries
   6  *
   7  * (C) Copyright IBM Corp. 2002, 2004
   8  *
   9  * Author(s): Martin Peschke <mpeschke@de.ibm.com>
  10  *            Raimund Schroeder <raimund.schroeder@de.ibm.com>
  11  *            Aron Zeh
  12  *            Wolfgang Taphorn
  13  *            Stefan Bader <stefan.bader@de.ibm.com>
  14  *            Heiko Carstens <heiko.carstens@de.ibm.com>
  15  *            Andreas Herrmann <aherrman@de.ibm.com>
  16  *            Volker Sameske <sameske@de.ibm.com>
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #define ZFCP_FSF_C_REVISION "$Revision: 1.88 $"
  34
  35 #include "zfcp_ext.h"
  36
  37 static int zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *);
  38 static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *);
  39 static int zfcp_fsf_open_port_handler(struct zfcp_fsf_req *);
  40 static int zfcp_fsf_close_port_handler(struct zfcp_fsf_req *);
  41 static int zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *);
  42 static int zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *);
  43 static int zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *);
  44 static int zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *);
  45 static int zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *);
  46 static int zfcp_fsf_send_fcp_command_task_management_handler(
  47         struct zfcp_fsf_req *);
  48 static int zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *);
  49 static int zfcp_fsf_status_read_handler(struct zfcp_fsf_req *);
  50 static int zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *);
  51 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *);
  52 static int zfcp_fsf_control_file_handler(struct zfcp_fsf_req *);
  53 static inline int zfcp_fsf_req_sbal_check(
  54         unsigned long *, struct zfcp_qdio_queue *, int);
  55 static inline int zfcp_use_one_sbal(
  56         struct scatterlist *, int, struct scatterlist *, int);
  57 static struct zfcp_fsf_req *zfcp_fsf_req_alloc(mempool_t *, int);
  58 static int zfcp_fsf_req_send(struct zfcp_fsf_req *, struct timer_list *);
  59 static int zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *);
  60 static int zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *);
  61 static int zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *);
  62 static int zfcp_fsf_req_dispatch(struct zfcp_fsf_req *);
  63 static void zfcp_fsf_req_dismiss(struct zfcp_fsf_req *);
  64 static void zfcp_fsf_req_free(struct zfcp_fsf_req *);
  65
  66 /* association between FSF command and FSF QTCB type */
  67 static u32 fsf_qtcb_type[] = {
  68         [FSF_QTCB_FCP_CMND] =             FSF_IO_COMMAND,
  69         [FSF_QTCB_ABORT_FCP_CMND] =       FSF_SUPPORT_COMMAND,
  70         [FSF_QTCB_OPEN_PORT_WITH_DID] =   FSF_SUPPORT_COMMAND,
  71         [FSF_QTCB_OPEN_LUN] =             FSF_SUPPORT_COMMAND,
  72         [FSF_QTCB_CLOSE_LUN] =            FSF_SUPPORT_COMMAND,
  73         [FSF_QTCB_CLOSE_PORT] =           FSF_SUPPORT_COMMAND,
  74         [FSF_QTCB_CLOSE_PHYSICAL_PORT] =  FSF_SUPPORT_COMMAND,
  75         [FSF_QTCB_SEND_ELS] =             FSF_SUPPORT_COMMAND,
  76         [FSF_QTCB_SEND_GENERIC] =         FSF_SUPPORT_COMMAND,
  77         [FSF_QTCB_EXCHANGE_CONFIG_DATA] = FSF_CONFIG_COMMAND,
  78         [FSF_QTCB_EXCHANGE_PORT_DATA] =   FSF_PORT_COMMAND,
  79         [FSF_QTCB_DOWNLOAD_CONTROL_FILE] = FSF_SUPPORT_COMMAND,
  80         [FSF_QTCB_UPLOAD_CONTROL_FILE] =  FSF_SUPPORT_COMMAND
  81 };
  82
  83 static const char zfcp_act_subtable_type[5][8] = {
  84         "unknown", "OS", "WWPN", "DID", "LUN"
  85 };
  86
  87 /****************************************************************/
  88 /*************** FSF related Functions  *************************/
  89 /****************************************************************/
  90
  91 #define ZFCP_LOG_AREA                   ZFCP_LOG_AREA_FSF
  92
  93 /*
  94  * function:    zfcp_fsf_req_alloc
  95  *
  96  * purpose:     Obtains an fsf_req and potentially a qtcb (for all but
  97  *              unsolicited requests) via helper functions
  98  *              Does some initial fsf request set-up.
  99  *
 100  * returns:     pointer to allocated fsf_req if successfull
 101  *              NULL otherwise
 102  *
 103  * locks:       none
 104  *
 105  */
 106 static struct zfcp_fsf_req *
 107 zfcp_fsf_req_alloc(mempool_t *pool, int req_flags)
 108 {
 109         size_t size;
 110         void *ptr;
 111         struct zfcp_fsf_req *fsf_req = NULL;
 112
 113         if (req_flags & ZFCP_REQ_NO_QTCB)
 114                 size = sizeof(struct zfcp_fsf_req);
 115         else
 116                 size = sizeof(struct zfcp_fsf_req_pool_element);
 117
 118         if (likely(pool != NULL))
 119                 ptr = mempool_alloc(pool, GFP_ATOMIC);
 120         else
 121                 ptr = kmalloc(size, GFP_ATOMIC);
 122
 123         if (unlikely(NULL == ptr))
 124                 goto out;
 125
 126         memset(ptr, 0, size);
 127
 128         if (req_flags & ZFCP_REQ_NO_QTCB) {
 129                 fsf_req = (struct zfcp_fsf_req *) ptr;
 130         } else {
 131                 fsf_req = &((struct zfcp_fsf_req_pool_element *) ptr)->fsf_req;
 132                 fsf_req->qtcb =
 133                         &((struct zfcp_fsf_req_pool_element *) ptr)->qtcb;
 134         }
 135
 136         fsf_req->pool = pool;
 137
 138  out:
 139         return fsf_req;
 140 }
 141
 142 /*
 143  * function:    zfcp_fsf_req_free
 144  *
 145  * purpose:     Frees the memory of an fsf_req (and potentially a qtcb) or
 146  *              returns it into the pool via helper functions.
 147  *
 148  * returns:     sod all
 149  *
 150  * locks:       none
 151  */
 152 static void
 153 zfcp_fsf_req_free(struct zfcp_fsf_req *fsf_req)
 154 {
 155         if (likely(fsf_req->pool != NULL))
 156                 mempool_free(fsf_req, fsf_req->pool);
 157                 else
 158                         kfree(fsf_req);
 159 }
 160
 161 /*
 162  * function:
 163  *
 164  * purpose:
 165  *
 166  * returns:
 167  *
 168  * note: qdio queues shall be down (no ongoing inbound processing)
 169  */
 170 int
 171 zfcp_fsf_req_dismiss_all(struct zfcp_adapter *adapter)
 172 {
 173         int retval = 0;
 174         struct zfcp_fsf_req *fsf_req, *tmp;
 175
 176         list_for_each_entry_safe(fsf_req, tmp, &adapter->fsf_req_list_head,
 177                                  list)
 178             zfcp_fsf_req_dismiss(fsf_req);
 179         /* wait_event_timeout? */
 180         while (!list_empty(&adapter->fsf_req_list_head)) {
 181                 ZFCP_LOG_DEBUG("fsf req list of adapter %s not yet empty\n",
 182                                zfcp_get_busid_by_adapter(adapter));
 183                 /* wait for woken intiators to clean up their requests */
 184                 msleep(jiffies_to_msecs(ZFCP_FSFREQ_CLEANUP_TIMEOUT));
 185         }
 186
 187         /* consistency check */
 188         if (atomic_read(&adapter->fsf_reqs_active)) {
 189                 ZFCP_LOG_NORMAL("bug: There are still %d FSF requests pending "
 190                                 "on adapter %s after cleanup.\n",
 191                                 atomic_read(&adapter->fsf_reqs_active),
 192                                 zfcp_get_busid_by_adapter(adapter));
 193                 atomic_set(&adapter->fsf_reqs_active, 0);
 194         }
 195
 196         return retval;
 197 }
 198
 199 /*
 200  * function:
 201  *
 202  * purpose:
 203  *
 204  * returns:
 205  */
 206 static void
 207 zfcp_fsf_req_dismiss(struct zfcp_fsf_req *fsf_req)
 208 {
 209         fsf_req->status |= ZFCP_STATUS_FSFREQ_DISMISSED;
 210         zfcp_fsf_req_complete(fsf_req);
 211 }
 212
 213 /*
 214  * function:    zfcp_fsf_req_complete
 215  *
 216  * purpose:     Updates active counts and timers for openfcp-reqs
 217  *              May cleanup request after req_eval returns
 218  *
 219  * returns:     0 - success
 220  *              !0 - failure
 221  *
 222  * context:
 223  */
 224 int
 225 zfcp_fsf_req_complete(struct zfcp_fsf_req *fsf_req)
 226 {
 227         int retval = 0;
 228         int cleanup;
 229         struct zfcp_adapter *adapter = fsf_req->adapter;
 230
 231         /* do some statistics */
 232         atomic_dec(&adapter->fsf_reqs_active);
 233
 234         if (unlikely(fsf_req->fsf_command == FSF_QTCB_UNSOLICITED_STATUS)) {
 235                 ZFCP_LOG_DEBUG("Status read response received\n");
 236                 /*
 237                  * Note: all cleanup handling is done in the callchain of
 238                  * the function call-chain below.
 239                  */
 240                 zfcp_fsf_status_read_handler(fsf_req);
 241                 goto out;
 242         } else
 243                 zfcp_fsf_protstatus_eval(fsf_req);
 244
 245         /*
 246          * fsf_req may be deleted due to waking up functions, so
 247          * cleanup is saved here and used later
 248          */
 249         if (likely(fsf_req->status & ZFCP_STATUS_FSFREQ_CLEANUP))
 250                 cleanup = 1;
 251         else
 252                 cleanup = 0;
 253
 254         fsf_req->status |= ZFCP_STATUS_FSFREQ_COMPLETED;
 255
 256         /* cleanup request if requested by initiator */
 257         if (likely(cleanup)) {
 258                 ZFCP_LOG_TRACE("removing FSF request %p\n", fsf_req);
 259                 /*
 260                  * lock must not be held here since it will be
 261                  * grabed by the called routine, too
 262                  */
 263                 zfcp_fsf_req_cleanup(fsf_req);
 264         } else {
 265                 /* notify initiator waiting for the requests completion */
 266                 ZFCP_LOG_TRACE("waking initiator of FSF request %p\n",fsf_req);
 267                 /*
 268                  * FIXME: Race! We must not access fsf_req here as it might have been
 269                  * cleaned up already due to the set ZFCP_STATUS_FSFREQ_COMPLETED
 270                  * flag. It's an improbable case. But, we have the same paranoia for
 271                  * the cleanup flag already.
 272                  * Might better be handled using complete()?
 273                  * (setting the flag and doing wakeup ought to be atomic
 274                  *  with regard to checking the flag as long as waitqueue is
 275                  *  part of the to be released structure)
 276                  */
 277                 wake_up(&fsf_req->completion_wq);
 278         }
 279
 280  out:
 281         return retval;
 282 }
 283
 284 /*
 285  * function:    zfcp_fsf_protstatus_eval
 286  *
 287  * purpose:     evaluates the QTCB of the finished FSF request
 288  *              and initiates appropriate actions
 289  *              (usually calling FSF command specific handlers)
 290  *
 291  * returns:
 292  *
 293  * context:
 294  *
 295  * locks:
 296  */
 297 static int
 298 zfcp_fsf_protstatus_eval(struct zfcp_fsf_req *fsf_req)
 299 {
 300         int retval = 0;
 301         struct zfcp_adapter *adapter = fsf_req->adapter;
 302
 303         ZFCP_LOG_DEBUG("QTCB is at %p\n", fsf_req->qtcb);
 304
 305         if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 306                 ZFCP_LOG_DEBUG("fsf_req 0x%lx has been dismissed\n",
 307                                (unsigned long) fsf_req);
 308                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
 309                         ZFCP_STATUS_FSFREQ_RETRY; /* only for SCSI cmnds. */
 310                 zfcp_cmd_dbf_event_fsf("dismiss", fsf_req, NULL, 0);
 311                 goto skip_protstatus;
 312         }
 313
 314         /* log additional information provided by FSF (if any) */
 315         if (unlikely(fsf_req->qtcb->header.log_length)) {
 316                 /* do not trust them ;-) */
 317                 if (fsf_req->qtcb->header.log_start > sizeof(struct fsf_qtcb)) {
 318                         ZFCP_LOG_NORMAL
 319                             ("bug: ULP (FSF logging) log data starts "
 320                              "beyond end of packet header. Ignored. "
 321                              "(start=%i, size=%li)\n",
 322                              fsf_req->qtcb->header.log_start,
 323                              sizeof(struct fsf_qtcb));
 324                         goto forget_log;
 325                 }
 326                 if ((size_t) (fsf_req->qtcb->header.log_start +
 327                      fsf_req->qtcb->header.log_length)
 328                     > sizeof(struct fsf_qtcb)) {
 329                         ZFCP_LOG_NORMAL("bug: ULP (FSF logging) log data ends "
 330                                         "beyond end of packet header. Ignored. "
 331                                         "(start=%i, length=%i, size=%li)\n",
 332                                         fsf_req->qtcb->header.log_start,
 333                                         fsf_req->qtcb->header.log_length,
 334                                         sizeof(struct fsf_qtcb));
 335                         goto forget_log;
 336                 }
 337                 ZFCP_LOG_TRACE("ULP log data: \n");
 338                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
 339                               (char *) fsf_req->qtcb +
 340                               fsf_req->qtcb->header.log_start,
 341                               fsf_req->qtcb->header.log_length);
 342         }
 343  forget_log:
 344
 345         /* evaluate FSF Protocol Status */
 346         switch (fsf_req->qtcb->prefix.prot_status) {
 347
 348         case FSF_PROT_GOOD:
 349                 ZFCP_LOG_TRACE("FSF_PROT_GOOD\n");
 350                 break;
 351
 352         case FSF_PROT_FSF_STATUS_PRESENTED:
 353                 ZFCP_LOG_TRACE("FSF_PROT_FSF_STATUS_PRESENTED\n");
 354                 break;
 355
 356         case FSF_PROT_QTCB_VERSION_ERROR:
 357                 ZFCP_LOG_FLAGS(0, "FSF_PROT_QTCB_VERSION_ERROR\n");
 358                 ZFCP_LOG_NORMAL("error: The adapter %s contains "
 359                                 "microcode of version 0x%x, the device driver "
 360                                 "only supports 0x%x. Aborting.\n",
 361                                 zfcp_get_busid_by_adapter(adapter),
 362                                 fsf_req->qtcb->prefix.prot_status_qual.
 363                                 version_error.fsf_version, ZFCP_QTCB_VERSION);
 364                 /* stop operation for this adapter */
 365                 debug_text_exception(adapter->erp_dbf, 0, "prot_ver_err");
 366                 zfcp_erp_adapter_shutdown(adapter, 0);
 367                 zfcp_cmd_dbf_event_fsf("qverserr", fsf_req,
 368                                        &fsf_req->qtcb->prefix.prot_status_qual,
 369                                        sizeof (union fsf_prot_status_qual));
 370                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 371                 break;
 372
 373         case FSF_PROT_SEQ_NUMB_ERROR:
 374                 ZFCP_LOG_FLAGS(0, "FSF_PROT_SEQ_NUMB_ERROR\n");
 375                 ZFCP_LOG_NORMAL("bug: Sequence number mismatch between "
 376                                 "driver (0x%x) and adapter %s (0x%x). "
 377                                 "Restarting all operations on this adapter.\n",
 378                                 fsf_req->qtcb->prefix.req_seq_no,
 379                                 zfcp_get_busid_by_adapter(adapter),
 380                                 fsf_req->qtcb->prefix.prot_status_qual.
 381                                 sequence_error.exp_req_seq_no);
 382                 debug_text_exception(adapter->erp_dbf, 0, "prot_seq_err");
 383                 /* restart operation on this adapter */
 384                 zfcp_erp_adapter_reopen(adapter, 0);
 385                 zfcp_cmd_dbf_event_fsf("seqnoerr", fsf_req,
 386                                        &fsf_req->qtcb->prefix.prot_status_qual,
 387                                        sizeof (union fsf_prot_status_qual));
 388                 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 389                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 390                 break;
 391
 392         case FSF_PROT_UNSUPP_QTCB_TYPE:
 393                 ZFCP_LOG_FLAGS(0, "FSF_PROT_UNSUP_QTCB_TYPE\n");
 394                 ZFCP_LOG_NORMAL("error: Packet header type used by the "
 395                                 "device driver is incompatible with "
 396                                 "that used on adapter %s. "
 397                                 "Stopping all operations on this adapter.\n",
 398                                 zfcp_get_busid_by_adapter(adapter));
 399                 debug_text_exception(adapter->erp_dbf, 0, "prot_unsup_qtcb");
 400                 zfcp_erp_adapter_shutdown(adapter, 0);
 401                 zfcp_cmd_dbf_event_fsf("unsqtcbt", fsf_req,
 402                                        &fsf_req->qtcb->prefix.prot_status_qual,
 403                                        sizeof (union fsf_prot_status_qual));
 404                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 405                 break;
 406
 407         case FSF_PROT_HOST_CONNECTION_INITIALIZING:
 408                 ZFCP_LOG_FLAGS(1, "FSF_PROT_HOST_CONNECTION_INITIALIZING\n");
 409                 zfcp_cmd_dbf_event_fsf("hconinit", fsf_req,
 410                                        &fsf_req->qtcb->prefix.prot_status_qual,
 411                                        sizeof (union fsf_prot_status_qual));
 412                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 413                 atomic_set_mask(ZFCP_STATUS_ADAPTER_HOST_CON_INIT,
 414                                 &(adapter->status));
 415                 debug_text_event(adapter->erp_dbf, 3, "prot_con_init");
 416                 break;
 417
 418         case FSF_PROT_DUPLICATE_REQUEST_ID:
 419                 ZFCP_LOG_FLAGS(0, "FSF_PROT_DUPLICATE_REQUEST_IDS\n");
 420                 if (fsf_req->qtcb) {
 421                         ZFCP_LOG_NORMAL("bug: The request identifier 0x%Lx "
 422                                         "to the adapter %s is ambiguous. "
 423                                         "Stopping all operations on this "
 424                                         "adapter.\n",
 425                                         *(unsigned long long *)
 426                                         (&fsf_req->qtcb->bottom.support.
 427                                          req_handle),
 428                                         zfcp_get_busid_by_adapter(adapter));
 429                 } else {
 430                         ZFCP_LOG_NORMAL("bug: The request identifier %p "
 431                                         "to the adapter %s is ambiguous. "
 432                                         "Stopping all operations on this "
 433                                         "adapter. "
 434                                         "(bug: got this for an unsolicited "
 435                                         "status read request)\n",
 436                                         fsf_req,
 437                                         zfcp_get_busid_by_adapter(adapter));
 438                 }
 439                 debug_text_exception(adapter->erp_dbf, 0, "prot_dup_id");
 440                 zfcp_erp_adapter_shutdown(adapter, 0);
 441                 zfcp_cmd_dbf_event_fsf("dupreqid", fsf_req,
 442                                        &fsf_req->qtcb->prefix.prot_status_qual,
 443                                        sizeof (union fsf_prot_status_qual));
 444                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 445                 break;
 446
 447         case FSF_PROT_LINK_DOWN:
 448                 ZFCP_LOG_FLAGS(1, "FSF_PROT_LINK_DOWN\n");
 449                 /*
 450                  * 'test and set' is not atomic here -
 451                  * it's ok as long as calls to our response queue handler
 452                  * (and thus execution of this code here) are serialized
 453                  * by the qdio module
 454                  */
 455                 if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
 456                                       &adapter->status)) {
 457                         switch (fsf_req->qtcb->prefix.prot_status_qual.
 458                                 locallink_error.code) {
 459                         case FSF_PSQ_LINK_NOLIGHT:
 460                                 ZFCP_LOG_INFO("The local link to adapter %s "
 461                                               "is down (no light detected).\n",
 462                                               zfcp_get_busid_by_adapter(
 463                                                       adapter));
 464                                 break;
 465                         case FSF_PSQ_LINK_WRAPPLUG:
 466                                 ZFCP_LOG_INFO("The local link to adapter %s "
 467                                               "is down (wrap plug detected).\n",
 468                                               zfcp_get_busid_by_adapter(
 469                                                       adapter));
 470                                 break;
 471                         case FSF_PSQ_LINK_NOFCP:
 472                                 ZFCP_LOG_INFO("The local link to adapter %s "
 473                                               "is down (adjacent node on "
 474                                               "link does not support FCP).\n",
 475                                               zfcp_get_busid_by_adapter(
 476                                                       adapter));
 477                                 break;
 478                         default:
 479                                 ZFCP_LOG_INFO("The local link to adapter %s "
 480                                               "is down "
 481                                               "(warning: unknown reason "
 482                                               "code).\n",
 483                                               zfcp_get_busid_by_adapter(
 484                                                       adapter));
 485                                 break;
 486
 487                         }
 488                         /*
 489                          * Due to the 'erp failed' flag the adapter won't
 490                          * be recovered but will be just set to 'blocked'
 491                          * state. All subordinary devices will have state
 492                          * 'blocked' and 'erp failed', too.
 493                          * Thus the adapter is still able to provide
 494                          * 'link up' status without being flooded with
 495                          * requests.
 496                          * (note: even 'close port' is not permitted)
 497                          */
 498                         ZFCP_LOG_INFO("Stopping all operations for adapter "
 499                                       "%s.\n",
 500                                       zfcp_get_busid_by_adapter(adapter));
 501                         atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED |
 502                                         ZFCP_STATUS_COMMON_ERP_FAILED,
 503                                         &adapter->status);
 504                         zfcp_erp_adapter_reopen(adapter, 0);
 505                         debug_text_event(adapter->erp_dbf, 1, "prot_link_down");
 506                 }
 507                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 508                 break;
 509
 510         case FSF_PROT_REEST_QUEUE:
 511                 ZFCP_LOG_FLAGS(1, "FSF_PROT_REEST_QUEUE\n");
 512                 debug_text_event(adapter->erp_dbf, 1, "prot_reest_queue");
 513                 ZFCP_LOG_INFO("The local link to adapter with "
 514                               "%s was re-plugged. "
 515                               "Re-starting operations on this adapter.\n",
 516                               zfcp_get_busid_by_adapter(adapter));
 517                 /* All ports should be marked as ready to run again */
 518                 zfcp_erp_modify_adapter_status(adapter,
 519                                                ZFCP_STATUS_COMMON_RUNNING,
 520                                                ZFCP_SET);
 521                 zfcp_erp_adapter_reopen(adapter,
 522                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
 523                                         | ZFCP_STATUS_COMMON_ERP_FAILED);
 524                 zfcp_cmd_dbf_event_fsf("reestque", fsf_req,
 525                                        &fsf_req->qtcb->prefix.prot_status_qual,
 526                                        sizeof (union fsf_prot_status_qual));
 527                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 528                 break;
 529
 530         case FSF_PROT_ERROR_STATE:
 531                 ZFCP_LOG_FLAGS(0, "FSF_PROT_ERROR_STATE\n");
 532                 ZFCP_LOG_NORMAL("error: The adapter %s "
 533                                 "has entered the error state. "
 534                                 "Restarting all operations on this "
 535                                 "adapter.\n",
 536                                 zfcp_get_busid_by_adapter(adapter));
 537                 debug_text_event(adapter->erp_dbf, 0, "prot_err_sta");
 538                 /* restart operation on this adapter */
 539                 zfcp_erp_adapter_reopen(adapter, 0);
 540                 zfcp_cmd_dbf_event_fsf("proterrs", fsf_req,
 541                                        &fsf_req->qtcb->prefix.prot_status_qual,
 542                                        sizeof (union fsf_prot_status_qual));
 543                 fsf_req->status |= ZFCP_STATUS_FSFREQ_RETRY;
 544                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 545                 break;
 546
 547         default:
 548                 ZFCP_LOG_NORMAL("bug: Transfer protocol status information "
 549                                 "provided by the adapter %s "
 550                                 "is not compatible with the device driver. "
 551                                 "Stopping all operations on this adapter. "
 552                                 "(debug info 0x%x).\n",
 553                                 zfcp_get_busid_by_adapter(adapter),
 554                                 fsf_req->qtcb->prefix.prot_status);
 555                 debug_text_event(adapter->erp_dbf, 0, "prot_inval:");
 556                 debug_exception(adapter->erp_dbf, 0,
 557                                 &fsf_req->qtcb->prefix.prot_status,
 558                                 sizeof (u32));
 559                 zfcp_erp_adapter_shutdown(adapter, 0);
 560                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 561         }
 562
 563  skip_protstatus:
 564         /*
 565          * always call specific handlers to give them a chance to do
 566          * something meaningful even in error cases
 567          */
 568         zfcp_fsf_fsfstatus_eval(fsf_req);
 569         return retval;
 570 }
 571
 572 /*
 573  * function:    zfcp_fsf_fsfstatus_eval
 574  *
 575  * purpose:     evaluates FSF status of completed FSF request
 576  *              and acts accordingly
 577  *
 578  * returns:
 579  */
 580 static int
 581 zfcp_fsf_fsfstatus_eval(struct zfcp_fsf_req *fsf_req)
 582 {
 583         int retval = 0;
 584
 585         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
 586                 goto skip_fsfstatus;
 587         }
 588
 589         /* evaluate FSF Status */
 590         switch (fsf_req->qtcb->header.fsf_status) {
 591         case FSF_UNKNOWN_COMMAND:
 592                 ZFCP_LOG_FLAGS(0, "FSF_UNKNOWN_COMMAND\n");
 593                 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
 594                                 "not known by the adapter %s "
 595                                 "Stopping all operations on this adapter. "
 596                                 "(debug info 0x%x).\n",
 597                                 zfcp_get_busid_by_adapter(fsf_req->adapter),
 598                                 fsf_req->qtcb->header.fsf_command);
 599                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 600                                      "fsf_s_unknown");
 601                 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
 602                 zfcp_cmd_dbf_event_fsf("unknownc", fsf_req,
 603                                        &fsf_req->qtcb->header.fsf_status_qual,
 604                                        sizeof (union fsf_status_qual));
 605                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 606                 break;
 607
 608         case FSF_FCP_RSP_AVAILABLE:
 609                 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
 610                 ZFCP_LOG_DEBUG("FCP Sense data will be presented to the "
 611                                "SCSI stack.\n");
 612                 debug_text_event(fsf_req->adapter->erp_dbf, 3, "fsf_s_rsp");
 613                 break;
 614
 615         case FSF_ADAPTER_STATUS_AVAILABLE:
 616                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
 617                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_astatus");
 618                 zfcp_fsf_fsfstatus_qual_eval(fsf_req);
 619                 break;
 620
 621         default:
 622                 break;
 623         }
 624
 625  skip_fsfstatus:
 626         /*
 627          * always call specific handlers to give them a chance to do
 628          * something meaningful even in error cases
 629          */
 630         zfcp_fsf_req_dispatch(fsf_req);
 631
 632         return retval;
 633 }
 634
 635 /*
 636  * function:    zfcp_fsf_fsfstatus_qual_eval
 637  *
 638  * purpose:     evaluates FSF status-qualifier of completed FSF request
 639  *              and acts accordingly
 640  *
 641  * returns:
 642  */
 643 static int
 644 zfcp_fsf_fsfstatus_qual_eval(struct zfcp_fsf_req *fsf_req)
 645 {
 646         int retval = 0;
 647
 648         switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
 649         case FSF_SQ_FCP_RSP_AVAILABLE:
 650                 ZFCP_LOG_FLAGS(2, "FSF_SQ_FCP_RSP_AVAILABLE\n");
 651                 debug_text_event(fsf_req->adapter->erp_dbf, 4, "fsf_sq_rsp");
 652                 break;
 653         case FSF_SQ_RETRY_IF_POSSIBLE:
 654                 ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
 655                 /* The SCSI-stack may now issue retries or escalate */
 656                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_retry");
 657                 zfcp_cmd_dbf_event_fsf("sqretry", fsf_req,
 658                                        &fsf_req->qtcb->header.fsf_status_qual,
 659                                        sizeof (union fsf_status_qual));
 660                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 661                 break;
 662         case FSF_SQ_COMMAND_ABORTED:
 663                 ZFCP_LOG_FLAGS(2, "FSF_SQ_COMMAND_ABORTED\n");
 664                 /* Carry the aborted state on to upper layer */
 665                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_sq_abort");
 666                 zfcp_cmd_dbf_event_fsf("sqabort", fsf_req,
 667                                        &fsf_req->qtcb->header.fsf_status_qual,
 668                                        sizeof (union fsf_status_qual));
 669                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTED;
 670                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 671                 break;
 672         case FSF_SQ_NO_RECOM:
 673                 ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RECOM\n");
 674                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 675                                      "fsf_sq_no_rec");
 676                 ZFCP_LOG_NORMAL("bug: No recommendation could be given for a"
 677                                 "problem on the adapter %s "
 678                                 "Stopping all operations on this adapter. ",
 679                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 680                 zfcp_erp_adapter_shutdown(fsf_req->adapter, 0);
 681                 zfcp_cmd_dbf_event_fsf("sqnrecom", fsf_req,
 682                                        &fsf_req->qtcb->header.fsf_status_qual,
 683                                        sizeof (union fsf_status_qual));
 684                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 685                 break;
 686         case FSF_SQ_ULP_PROGRAMMING_ERROR:
 687                 ZFCP_LOG_FLAGS(0, "FSF_SQ_ULP_PROGRAMMING_ERROR\n");
 688                 ZFCP_LOG_NORMAL("error: not enough SBALs for data transfer "
 689                                 "(adapter %s)\n",
 690                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 691                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
 692                                      "fsf_sq_ulp_err");
 693                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 694                 break;
 695         case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
 696         case FSF_SQ_NO_RETRY_POSSIBLE:
 697         case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
 698                 /* dealt with in the respective functions */
 699                 break;
 700         default:
 701                 ZFCP_LOG_NORMAL("bug: Additional status info could "
 702                                 "not be interpreted properly.\n");
 703                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
 704                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
 705                               sizeof (union fsf_status_qual));
 706                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval:");
 707                 debug_exception(fsf_req->adapter->erp_dbf, 0,
 708                                 &fsf_req->qtcb->header.fsf_status_qual.word[0],
 709                                 sizeof (u32));
 710                 zfcp_cmd_dbf_event_fsf("squndef", fsf_req,
 711                                        &fsf_req->qtcb->header.fsf_status_qual,
 712                                        sizeof (union fsf_status_qual));
 713                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 714                 break;
 715         }
 716
 717         return retval;
 718 }
 719
 720 /*
 721  * function:    zfcp_fsf_req_dispatch
 722  *
 723  * purpose:     calls the appropriate command specific handler
 724  *
 725  * returns:
 726  */
 727 static int
 728 zfcp_fsf_req_dispatch(struct zfcp_fsf_req *fsf_req)
 729 {
 730         struct zfcp_erp_action *erp_action = fsf_req->erp_action;
 731         struct zfcp_adapter *adapter = fsf_req->adapter;
 732         int retval = 0;
 733
 734         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
 735                 ZFCP_LOG_TRACE("fsf_req=%p, QTCB=%p\n", fsf_req, fsf_req->qtcb);
 736                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
 737                               (char *) fsf_req->qtcb, sizeof(struct fsf_qtcb));
 738         }
 739
 740         switch (fsf_req->fsf_command) {
 741
 742         case FSF_QTCB_FCP_CMND:
 743                 ZFCP_LOG_FLAGS(3, "FSF_QTCB_FCP_CMND\n");
 744                 zfcp_fsf_send_fcp_command_handler(fsf_req);
 745                 break;
 746
 747         case FSF_QTCB_ABORT_FCP_CMND:
 748                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_ABORT_FCP_CMND\n");
 749                 zfcp_fsf_abort_fcp_command_handler(fsf_req);
 750                 break;
 751
 752         case FSF_QTCB_SEND_GENERIC:
 753                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_GENERIC\n");
 754                 zfcp_fsf_send_ct_handler(fsf_req);
 755                 break;
 756
 757         case FSF_QTCB_OPEN_PORT_WITH_DID:
 758                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_PORT_WITH_DID\n");
 759                 zfcp_fsf_open_port_handler(fsf_req);
 760                 break;
 761
 762         case FSF_QTCB_OPEN_LUN:
 763                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_OPEN_LUN\n");
 764                 zfcp_fsf_open_unit_handler(fsf_req);
 765                 break;
 766
 767         case FSF_QTCB_CLOSE_LUN:
 768                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_LUN\n");
 769                 zfcp_fsf_close_unit_handler(fsf_req);
 770                 break;
 771
 772         case FSF_QTCB_CLOSE_PORT:
 773                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PORT\n");
 774                 zfcp_fsf_close_port_handler(fsf_req);
 775                 break;
 776
 777         case FSF_QTCB_CLOSE_PHYSICAL_PORT:
 778                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_CLOSE_PHYSICAL_PORT\n");
 779                 zfcp_fsf_close_physical_port_handler(fsf_req);
 780                 break;
 781
 782         case FSF_QTCB_EXCHANGE_CONFIG_DATA:
 783                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_CONFIG_DATA\n");
 784                 zfcp_fsf_exchange_config_data_handler(fsf_req);
 785                 break;
 786
 787         case FSF_QTCB_EXCHANGE_PORT_DATA:
 788                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_EXCHANGE_PORT_DATA\n");
 789                 zfcp_fsf_exchange_port_data_handler(fsf_req);
 790                 break;
 791
 792         case FSF_QTCB_SEND_ELS:
 793                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_SEND_ELS\n");
 794                 zfcp_fsf_send_els_handler(fsf_req);
 795                 break;
 796
 797         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
 798                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_DOWNLOAD_CONTROL_FILE\n");
 799                 zfcp_fsf_control_file_handler(fsf_req);
 800                 break;
 801
 802         case FSF_QTCB_UPLOAD_CONTROL_FILE:
 803                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UPLOAD_CONTROL_FILE\n");
 804                 zfcp_fsf_control_file_handler(fsf_req);
 805                 break;
 806
 807         default:
 808                 ZFCP_LOG_FLAGS(2, "FSF_QTCB_UNKNOWN\n");
 809                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
 810                 ZFCP_LOG_NORMAL("bug: Command issued by the device driver is "
 811                                 "not supported by the adapter %s\n",
 812                                 zfcp_get_busid_by_adapter(fsf_req->adapter));
 813                 if (fsf_req->fsf_command != fsf_req->qtcb->header.fsf_command)
 814                         ZFCP_LOG_NORMAL
 815                             ("bug: Command issued by the device driver differs "
 816                              "from the command returned by the adapter %s "
 817                              "(debug info 0x%x, 0x%x).\n",
 818                              zfcp_get_busid_by_adapter(fsf_req->adapter),
 819                              fsf_req->fsf_command,
 820                              fsf_req->qtcb->header.fsf_command);
 821         }
 822
 823         if (!erp_action)
 824                 return retval;
 825
 826         debug_text_event(adapter->erp_dbf, 3, "a_frh");
 827         debug_event(adapter->erp_dbf, 3, &erp_action->action, sizeof (int));
 828         zfcp_erp_async_handler(erp_action, 0);
 829
 830         return retval;
 831 }
 832
 833 /*
 834  * function:    zfcp_fsf_status_read
 835  *
 836  * purpose:     initiates a Status Read command at the specified adapter
 837  *
 838  * returns:
 839  */
 840 int
 841 zfcp_fsf_status_read(struct zfcp_adapter *adapter, int req_flags)
 842 {
 843         struct zfcp_fsf_req *fsf_req;
 844         struct fsf_status_read_buffer *status_buffer;
 845         unsigned long lock_flags;
 846         volatile struct qdio_buffer_element *sbale;
 847         int retval = 0;
 848
 849         /* setup new FSF request */
 850         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_UNSOLICITED_STATUS,
 851                                      req_flags | ZFCP_REQ_NO_QTCB,
 852                                      adapter->pool.fsf_req_status_read,
 853                                      &lock_flags, &fsf_req);
 854         if (retval < 0) {
 855                 ZFCP_LOG_INFO("error: Could not create unsolicited status "
 856                               "buffer for adapter %s.\n",
 857                               zfcp_get_busid_by_adapter(adapter));
 858                 goto failed_req_create;
 859         }
 860
 861         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
 862         sbale[0].flags |= SBAL_FLAGS0_TYPE_STATUS;
 863         sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY;
 864         fsf_req->sbale_curr = 2;
 865
 866         status_buffer =
 867                 mempool_alloc(adapter->pool.data_status_read, GFP_ATOMIC);
 868         if (!status_buffer) {
 869                 ZFCP_LOG_NORMAL("bug: could not get some buffer\n");
 870                 goto failed_buf;
 871         }
 872         memset(status_buffer, 0, sizeof (struct fsf_status_read_buffer));
 873         fsf_req->data.status_read.buffer = status_buffer;
 874
 875         /* insert pointer to respective buffer */
 876         sbale = zfcp_qdio_sbale_curr(fsf_req);
 877         sbale->addr = (void *) status_buffer;
 878         sbale->length = sizeof(struct fsf_status_read_buffer);
 879
 880         /* start QDIO request for this FSF request */
 881         retval = zfcp_fsf_req_send(fsf_req, NULL);
 882         if (retval) {
 883                 ZFCP_LOG_DEBUG("error: Could not set-up unsolicited status "
 884                                "environment.\n");
 885                 goto failed_req_send;
 886         }
 887
 888         ZFCP_LOG_TRACE("Status Read request initiated (adapter%s)\n",
 889                        zfcp_get_busid_by_adapter(adapter));
 890         goto out;
 891
 892  failed_req_send:
 893         mempool_free(status_buffer, adapter->pool.data_status_read);
 894
 895  failed_buf:
 896         zfcp_fsf_req_free(fsf_req);
 897  failed_req_create:
 898  out:
 899         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
 900         return retval;
 901 }
 902
 903 static int
 904 zfcp_fsf_status_read_port_closed(struct zfcp_fsf_req *fsf_req)
 905 {
 906         struct fsf_status_read_buffer *status_buffer;
 907         struct zfcp_adapter *adapter;
 908         struct zfcp_port *port;
 909         unsigned long flags;
 910
 911         status_buffer = fsf_req->data.status_read.buffer;
 912         adapter = fsf_req->adapter;
 913
 914         read_lock_irqsave(&zfcp_data.config_lock, flags);
 915         list_for_each_entry(port, &adapter->port_list_head, list)
 916             if (port->d_id == (status_buffer->d_id & ZFCP_DID_MASK))
 917                 break;
 918         read_unlock_irqrestore(&zfcp_data.config_lock, flags);
 919
 920         if (!port || (port->d_id != (status_buffer->d_id & ZFCP_DID_MASK))) {
 921                 ZFCP_LOG_NORMAL("bug: Reopen port indication received for"
 922                                 "nonexisting port with d_id 0x%08x on "
 923                                 "adapter %s. Ignored.\n",
 924                                 status_buffer->d_id & ZFCP_DID_MASK,
 925                                 zfcp_get_busid_by_adapter(adapter));
 926                 goto out;
 927         }
 928
 929         switch (status_buffer->status_subtype) {
 930
 931         case FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT:
 932                 ZFCP_LOG_FLAGS(2, "FSF_STATUS_READ_SUB_CLOSE_PHYS_PORT\n");
 933                 debug_text_event(adapter->erp_dbf, 3, "unsol_pc_phys:");
 934                 zfcp_erp_port_reopen(port, 0);
 935                 break;
 936
 937         case FSF_STATUS_READ_SUB_ERROR_PORT:
 938                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SUB_ERROR_PORT\n");
 939                 debug_text_event(adapter->erp_dbf, 1, "unsol_pc_err:");
 940                 zfcp_erp_port_shutdown(port, 0);
 941                 break;
 942
 943         default:
 944                 debug_text_event(adapter->erp_dbf, 0, "unsol_unk_sub:");
 945                 debug_exception(adapter->erp_dbf, 0,
 946                                 &status_buffer->status_subtype, sizeof (u32));
 947                 ZFCP_LOG_NORMAL("bug: Undefined status subtype received "
 948                                 "for a reopen indication on port with "
 949                                 "d_id 0x%08x on the adapter %s. "
 950                                 "Ignored. (debug info 0x%x)\n",
 951                                 status_buffer->d_id,
 952                                 zfcp_get_busid_by_adapter(adapter),
 953                                 status_buffer->status_subtype);
 954         }
 955  out:
 956         return 0;
 957 }
 958
 959 /*
 960  * function:    zfcp_fsf_status_read_handler
 961  *
 962  * purpose:     is called for finished Open Port command
 963  *
 964  * returns:
 965  */
 966 static int
 967 zfcp_fsf_status_read_handler(struct zfcp_fsf_req *fsf_req)
 968 {
 969         int retval = 0;
 970         struct zfcp_adapter *adapter = fsf_req->adapter;
 971         struct fsf_status_read_buffer *status_buffer =
 972             fsf_req->data.status_read.buffer;
 973
 974         if (fsf_req->status & ZFCP_STATUS_FSFREQ_DISMISSED) {
 975                 mempool_free(status_buffer, adapter->pool.data_status_read);
 976                 zfcp_fsf_req_cleanup(fsf_req);
 977                 goto out;
 978         }
 979
 980         switch (status_buffer->status_type) {
 981
 982         case FSF_STATUS_READ_PORT_CLOSED:
 983                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_PORT_CLOSED\n");
 984                 debug_text_event(adapter->erp_dbf, 3, "unsol_pclosed:");
 985                 debug_event(adapter->erp_dbf, 3,
 986                             &status_buffer->d_id, sizeof (u32));
 987                 zfcp_fsf_status_read_port_closed(fsf_req);
 988                 break;
 989
 990         case FSF_STATUS_READ_INCOMING_ELS:
 991                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_INCOMING_ELS\n");
 992                 debug_text_event(adapter->erp_dbf, 3, "unsol_els:");
 993                 zfcp_fsf_incoming_els(fsf_req);
 994                 break;
 995
 996         case FSF_STATUS_READ_SENSE_DATA_AVAIL:
 997                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_SENSE_DATA_AVAIL\n");
 998                 debug_text_event(adapter->erp_dbf, 3, "unsol_sense:");
 999                 ZFCP_LOG_INFO("unsolicited sense data received (adapter %s)\n",
1000                               zfcp_get_busid_by_adapter(adapter));
1001                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL, (char *) status_buffer,
1002                               sizeof(struct fsf_status_read_buffer));
1003                 break;
1004
1005         case FSF_STATUS_READ_BIT_ERROR_THRESHOLD:
1006                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_BIT_ERROR_THRESHOLD\n");
1007                 debug_text_event(adapter->erp_dbf, 3, "unsol_bit_err:");
1008                 ZFCP_LOG_NORMAL("Bit error threshold data received:\n");
1009                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
1010                               (char *) status_buffer,
1011                               sizeof (struct fsf_status_read_buffer));
1012                 break;
1013
1014         case FSF_STATUS_READ_LINK_DOWN:
1015                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_DOWN\n");
1016                 debug_text_event(adapter->erp_dbf, 0, "unsol_link_down:");
1017                 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
1018                               zfcp_get_busid_by_adapter(adapter));
1019                 atomic_set_mask(ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
1020                                 &adapter->status);
1021                 zfcp_erp_adapter_failed(adapter);
1022                 break;
1023
1024         case FSF_STATUS_READ_LINK_UP:
1025                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_LINK_UP\n");
1026                 debug_text_event(adapter->erp_dbf, 2, "unsol_link_up:");
1027                 ZFCP_LOG_INFO("Local link to adapter %s was replugged. "
1028                               "Restarting operations on this adapter\n",
1029                               zfcp_get_busid_by_adapter(adapter));
1030                 /* All ports should be marked as ready to run again */
1031                 zfcp_erp_modify_adapter_status(adapter,
1032                                                ZFCP_STATUS_COMMON_RUNNING,
1033                                                ZFCP_SET);
1034                 zfcp_erp_adapter_reopen(adapter,
1035                                         ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED
1036                                         | ZFCP_STATUS_COMMON_ERP_FAILED);
1037                 break;
1038
1039         case FSF_STATUS_READ_CFDC_UPDATED:
1040                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_UPDATED\n");
1041                 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_update:");
1042                 ZFCP_LOG_INFO("CFDC has been updated on the adapter %s\n",
1043                               zfcp_get_busid_by_adapter(adapter));
1044                 zfcp_erp_adapter_access_changed(adapter);
1045                 break;
1046
1047         case FSF_STATUS_READ_CFDC_HARDENED:
1048                 ZFCP_LOG_FLAGS(1, "FSF_STATUS_READ_CFDC_HARDENED\n");
1049                 debug_text_event(adapter->erp_dbf, 2, "unsol_cfdc_harden:");
1050                 switch (status_buffer->status_subtype) {
1051                 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE:
1052                         ZFCP_LOG_INFO("CFDC of adapter %s saved on SE\n",
1053                                       zfcp_get_busid_by_adapter(adapter));
1054                         break;
1055                 case FSF_STATUS_READ_SUB_CFDC_HARDENED_ON_SE2:
1056                         ZFCP_LOG_INFO("CFDC of adapter %s has been copied "
1057                                       "to the secondary SE\n",
1058                                 zfcp_get_busid_by_adapter(adapter));
1059                         break;
1060                 default:
1061                         ZFCP_LOG_INFO("CFDC of adapter %s has been hardened\n",
1062                                       zfcp_get_busid_by_adapter(adapter));
1063                 }
1064                 break;
1065
1066         default:
1067                 debug_text_event(adapter->erp_dbf, 0, "unsol_unknown:");
1068                 debug_exception(adapter->erp_dbf, 0,
1069                                 &status_buffer->status_type, sizeof (u32));
1070                 ZFCP_LOG_NORMAL("bug: An unsolicited status packet of unknown "
1071                                 "type was received (debug info 0x%x)\n",
1072                                 status_buffer->status_type);
1073                 ZFCP_LOG_DEBUG("Dump of status_read_buffer %p:\n",
1074                                status_buffer);
1075                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1076                               (char *) status_buffer,
1077                               sizeof (struct fsf_status_read_buffer));
1078                 break;
1079         }
1080         mempool_free(status_buffer, adapter->pool.data_status_read);
1081         zfcp_fsf_req_cleanup(fsf_req);
1082         /*
1083          * recycle buffer and start new request repeat until outbound
1084          * queue is empty or adapter shutdown is requested
1085          */
1086         /*
1087          * FIXME(qdio):
1088          * we may wait in the req_create for 5s during shutdown, so
1089          * qdio_cleanup will have to wait at least that long before returning
1090          * with failure to allow us a proper cleanup under all circumstances
1091          */
1092         /*
1093          * FIXME:
1094          * allocation failure possible? (Is this code needed?)
1095          */
1096         retval = zfcp_fsf_status_read(adapter, 0);
1097         if (retval < 0) {
1098                 ZFCP_LOG_INFO("Failed to create unsolicited status read "
1099                               "request for the adapter %s.\n",
1100                               zfcp_get_busid_by_adapter(adapter));
1101                 /* temporary fix to avoid status read buffer shortage */
1102                 adapter->status_read_failed++;
1103                 if ((ZFCP_STATUS_READS_RECOM - adapter->status_read_failed)
1104                     < ZFCP_STATUS_READ_FAILED_THRESHOLD) {
1105                         ZFCP_LOG_INFO("restart adapter %s due to status read "
1106                                       "buffer shortage\n",
1107                                       zfcp_get_busid_by_adapter(adapter));
1108                         zfcp_erp_adapter_reopen(adapter, 0);
1109                 }
1110         }
1111  out:
1112         return retval;
1113 }
1114
1115 /*
1116  * function:    zfcp_fsf_abort_fcp_command
1117  *
1118  * purpose:     tells FSF to abort a running SCSI command
1119  *
1120  * returns:     address of initiated FSF request
1121  *              NULL - request could not be initiated
1122  *
1123  * FIXME(design): should be watched by a timeout !!!
1124  * FIXME(design) shouldn't this be modified to return an int
1125  *               also...don't know how though
1126  */
1127 struct zfcp_fsf_req *
1128 zfcp_fsf_abort_fcp_command(unsigned long old_req_id,
1129                            struct zfcp_adapter *adapter,
1130                            struct zfcp_unit *unit, int req_flags)
1131 {
1132         volatile struct qdio_buffer_element *sbale;
1133         unsigned long lock_flags;
1134         struct zfcp_fsf_req *fsf_req = NULL;
1135         int retval = 0;
1136
1137         /* setup new FSF request */
1138         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_ABORT_FCP_CMND,
1139                                      req_flags, adapter->pool.fsf_req_abort,
1140                                      &lock_flags, &fsf_req);
1141         if (retval < 0) {
1142                 ZFCP_LOG_INFO("error: Failed to create an abort command "
1143                               "request for lun 0x%016Lx on port 0x%016Lx "
1144                               "on adapter %s.\n",
1145                               unit->fcp_lun,
1146                               unit->port->wwpn,
1147                               zfcp_get_busid_by_adapter(adapter));
1148                 goto out;
1149         }
1150
1151         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1152         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
1153         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
1154
1155         fsf_req->data.abort_fcp_command.unit = unit;
1156
1157         /* set handles of unit and its parent port in QTCB */
1158         fsf_req->qtcb->header.lun_handle = unit->handle;
1159         fsf_req->qtcb->header.port_handle = unit->port->handle;
1160
1161         /* set handle of request which should be aborted */
1162         fsf_req->qtcb->bottom.support.req_handle = (u64) old_req_id;
1163
1164         /* start QDIO request for this FSF request */
1165
1166         zfcp_fsf_start_scsi_er_timer(adapter);
1167         retval = zfcp_fsf_req_send(fsf_req, NULL);
1168         if (retval) {
1169                 del_timer(&adapter->scsi_er_timer);
1170                 ZFCP_LOG_INFO("error: Failed to send abort command request "
1171                               "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
1172                               zfcp_get_busid_by_adapter(adapter),
1173                               unit->port->wwpn, unit->fcp_lun);
1174                 zfcp_fsf_req_free(fsf_req);
1175                 fsf_req = NULL;
1176                 goto out;
1177         }
1178
1179         ZFCP_LOG_DEBUG("Abort FCP Command request initiated "
1180                        "(adapter%s, port d_id=0x%08x, "
1181                        "unit x%016Lx, old_req_id=0x%lx)\n",
1182                        zfcp_get_busid_by_adapter(adapter),
1183                        unit->port->d_id,
1184                        unit->fcp_lun, old_req_id);
1185  out:
1186         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
1187         return fsf_req;
1188 }
1189
1190 /*
1191  * function:    zfcp_fsf_abort_fcp_command_handler
1192  *
1193  * purpose:     is called for finished Abort FCP Command request
1194  *
1195  * returns:
1196  */
1197 static int
1198 zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *new_fsf_req)
1199 {
1200         int retval = -EINVAL;
1201         struct zfcp_unit *unit = new_fsf_req->data.abort_fcp_command.unit;
1202         unsigned char status_qual =
1203             new_fsf_req->qtcb->header.fsf_status_qual.word[0];
1204
1205         del_timer(&new_fsf_req->adapter->scsi_er_timer);
1206
1207         if (new_fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
1208                 /* do not set ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED */
1209                 goto skip_fsfstatus;
1210         }
1211
1212         /* evaluate FSF status in QTCB */
1213         switch (new_fsf_req->qtcb->header.fsf_status) {
1214
1215         case FSF_PORT_HANDLE_NOT_VALID:
1216                 if (status_qual >> 4 != status_qual % 0xf) {
1217                         ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1218                         debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1219                                          "fsf_s_phand_nv0");
1220                         /*
1221                          * In this case a command that was sent prior to a port
1222                          * reopen was aborted (handles are different). This is
1223                          * fine.
1224                          */
1225                 } else {
1226                         ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
1227                         ZFCP_LOG_INFO("Temporary port identifier 0x%x for "
1228                                       "port 0x%016Lx on adapter %s invalid. "
1229                                       "This may happen occasionally.\n",
1230                                       unit->port->handle,
1231                                       unit->port->wwpn,
1232                                       zfcp_get_busid_by_unit(unit));
1233                         ZFCP_LOG_INFO("status qualifier:\n");
1234                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1235                                       (char *) &new_fsf_req->qtcb->header.
1236                                       fsf_status_qual,
1237                                       sizeof (union fsf_status_qual));
1238                         /* Let's hope this sorts out the mess */
1239                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1240                                          "fsf_s_phand_nv1");
1241                         zfcp_erp_adapter_reopen(unit->port->adapter, 0);
1242                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1243                 }
1244                 break;
1245
1246         case FSF_LUN_HANDLE_NOT_VALID:
1247                 if (status_qual >> 4 != status_qual % 0xf) {
1248                         /* 2 */
1249                         ZFCP_LOG_FLAGS(0, "FSF_LUN_HANDLE_NOT_VALID\n");
1250                         debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1251                                          "fsf_s_lhand_nv0");
1252                         /*
1253                          * In this case a command that was sent prior to a unit
1254                          * reopen was aborted (handles are different).
1255                          * This is fine.
1256                          */
1257                 } else {
1258                         ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
1259                         ZFCP_LOG_INFO
1260                             ("Warning: Temporary LUN identifier 0x%x of LUN "
1261                              "0x%016Lx on port 0x%016Lx on adapter %s is "
1262                              "invalid. This may happen in rare cases. "
1263                              "Trying to re-establish link.\n",
1264                              unit->handle,
1265                              unit->fcp_lun,
1266                              unit->port->wwpn,
1267                              zfcp_get_busid_by_unit(unit));
1268                         ZFCP_LOG_DEBUG("Status qualifier data:\n");
1269                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
1270                                       (char *) &new_fsf_req->qtcb->header.
1271                                       fsf_status_qual,
1272                                       sizeof (union fsf_status_qual));
1273                         /* Let's hope this sorts out the mess */
1274                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1275                                          "fsf_s_lhand_nv1");
1276                         zfcp_erp_port_reopen(unit->port, 0);
1277                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1278                 }
1279                 break;
1280
1281         case FSF_FCP_COMMAND_DOES_NOT_EXIST:
1282                 ZFCP_LOG_FLAGS(2, "FSF_FCP_COMMAND_DOES_NOT_EXIST\n");
1283                 retval = 0;
1284                 debug_text_event(new_fsf_req->adapter->erp_dbf, 3,
1285                                  "fsf_s_no_exist");
1286                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED;
1287                 break;
1288
1289         case FSF_PORT_BOXED:
1290                 /* 2 */
1291                 ZFCP_LOG_FLAGS(0, "FSF_PORT_BOXED\n");
1292                 ZFCP_LOG_INFO("Remote port 0x%016Lx on adapter %s needs to "
1293                               "be reopened\n", unit->port->wwpn,
1294                               zfcp_get_busid_by_unit(unit));
1295                 debug_text_event(new_fsf_req->adapter->erp_dbf, 2,
1296                                  "fsf_s_pboxed");
1297                 zfcp_erp_port_reopen(unit->port, 0);
1298                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1299                     | ZFCP_STATUS_FSFREQ_RETRY;
1300                 break;
1301
1302         case FSF_LUN_BOXED:
1303                 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
1304                 ZFCP_LOG_INFO(
1305                         "unit 0x%016Lx on port 0x%016Lx on adapter %s needs "
1306                         "to be reopened\n",
1307                         unit->fcp_lun, unit->port->wwpn,
1308                         zfcp_get_busid_by_unit(unit));
1309                 debug_text_event(new_fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
1310                 zfcp_erp_unit_reopen(unit, 0);
1311                 zfcp_cmd_dbf_event_fsf("unitbox", new_fsf_req,
1312                         &new_fsf_req->qtcb->header.fsf_status_qual,
1313                         sizeof(union fsf_status_qual));
1314                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1315                         | ZFCP_STATUS_FSFREQ_RETRY;
1316                 break;
1317
1318         case FSF_ADAPTER_STATUS_AVAILABLE:
1319                 /* 2 */
1320                 ZFCP_LOG_FLAGS(0, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1321                 switch (new_fsf_req->qtcb->header.fsf_status_qual.word[0]) {
1322                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1323                         ZFCP_LOG_FLAGS(2,
1324                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1325                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1326                                          "fsf_sq_ltest");
1327                         /* reopening link to port */
1328                         zfcp_erp_port_reopen(unit->port, 0);
1329                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1330                         break;
1331                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1332                         ZFCP_LOG_FLAGS(2,
1333                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1334                         /* SCSI stack will escalate */
1335                         debug_text_event(new_fsf_req->adapter->erp_dbf, 1,
1336                                          "fsf_sq_ulp");
1337                         new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1338                         break;
1339                 default:
1340                         ZFCP_LOG_NORMAL
1341                             ("bug: Wrong status qualifier 0x%x arrived.\n",
1342                              new_fsf_req->qtcb->header.fsf_status_qual.word[0]);
1343                         debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1344                                          "fsf_sq_inval:");
1345                         debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1346                                         &new_fsf_req->qtcb->header.
1347                                         fsf_status_qual.word[0], sizeof (u32));
1348                         break;
1349                 }
1350                 break;
1351
1352         case FSF_GOOD:
1353                 /* 3 */
1354                 ZFCP_LOG_FLAGS(0, "FSF_GOOD\n");
1355                 retval = 0;
1356                 new_fsf_req->status |= ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED;
1357                 break;
1358
1359         default:
1360                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1361                                 "(debug info 0x%x)\n",
1362                                 new_fsf_req->qtcb->header.fsf_status);
1363                 debug_text_event(new_fsf_req->adapter->erp_dbf, 0,
1364                                  "fsf_s_inval:");
1365                 debug_exception(new_fsf_req->adapter->erp_dbf, 0,
1366                                 &new_fsf_req->qtcb->header.fsf_status,
1367                                 sizeof (u32));
1368                 break;
1369         }
1370  skip_fsfstatus:
1371         return retval;
1372 }
1373
1374 /**
1375  * zfcp_use_one_sbal - checks whether req buffer and resp bother each fit into
1376  *      one SBALE
1377  * Two scatter-gather lists are passed, one for the reqeust and one for the
1378  * response.
1379  */
1380 static inline int
1381 zfcp_use_one_sbal(struct scatterlist *req, int req_count,
1382                   struct scatterlist *resp, int resp_count)
1383 {
1384         return ((req_count == 1) &&
1385                 (resp_count == 1) &&
1386                 (((unsigned long) zfcp_sg_to_address(&req[0]) &
1387                   PAGE_MASK) ==
1388                  ((unsigned long) (zfcp_sg_to_address(&req[0]) +
1389                                    req[0].length - 1) & PAGE_MASK)) &&
1390                 (((unsigned long) zfcp_sg_to_address(&resp[0]) &
1391                   PAGE_MASK) ==
1392                  ((unsigned long) (zfcp_sg_to_address(&resp[0]) +
1393                                    resp[0].length - 1) & PAGE_MASK)));
1394 }
1395
1396 /**
1397  * zfcp_fsf_send_ct - initiate a Generic Service request (FC-GS)
1398  * @ct: pointer to struct zfcp_send_ct which conatins all needed data for
1399  *      the request
1400  * @pool: pointer to memory pool, if non-null this pool is used to allocate
1401  *      a struct zfcp_fsf_req
1402  * @erp_action: pointer to erp_action, if non-null the Generic Service request
1403  *      is sent within error recovery
1404  */
1405 int
1406 zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool,
1407                  struct zfcp_erp_action *erp_action)
1408 {
1409         volatile struct qdio_buffer_element *sbale;
1410         struct zfcp_port *port;
1411         struct zfcp_adapter *adapter;
1412         struct zfcp_fsf_req *fsf_req;
1413         unsigned long lock_flags;
1414         int bytes;
1415         int ret = 0;
1416
1417         port = ct->port;
1418         adapter = port->adapter;
1419
1420         ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_GENERIC,
1421                                   ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
1422                                   pool, &lock_flags, &fsf_req);
1423         if (ret < 0) {
1424                 ZFCP_LOG_INFO("error: Could not create CT request (FC-GS) for "
1425                               "adapter: %s\n",
1426                               zfcp_get_busid_by_adapter(adapter));
1427                 goto failed_req;
1428         }
1429
1430         if (erp_action != NULL) {
1431                 erp_action->fsf_req = fsf_req;
1432                 fsf_req->erp_action = erp_action;
1433         }
1434
1435         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1436         if (zfcp_use_one_sbal(ct->req, ct->req_count,
1437                               ct->resp, ct->resp_count)){
1438                 /* both request buffer and response buffer
1439                    fit into one sbale each */
1440                 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1441                 sbale[2].addr = zfcp_sg_to_address(&ct->req[0]);
1442                 sbale[2].length = ct->req[0].length;
1443                 sbale[3].addr = zfcp_sg_to_address(&ct->resp[0]);
1444                 sbale[3].length = ct->resp[0].length;
1445                 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1446         } else if (adapter->supported_features &
1447                    FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1448                 /* try to use chained SBALs */
1449                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1450                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1451                                                 ct->req, ct->req_count,
1452                                                 ZFCP_MAX_SBALS_PER_CT_REQ);
1453                 if (bytes <= 0) {
1454                         ZFCP_LOG_INFO("error: creation of CT request failed "
1455                                       "on adapter %s\n",
1456                                       zfcp_get_busid_by_adapter(adapter));
1457                         if (bytes == 0)
1458                                 ret = -ENOMEM;
1459                         else
1460                                 ret = bytes;
1461
1462                         goto failed_send;
1463                 }
1464                 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1465                 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1466                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1467                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1468                                                 ct->resp, ct->resp_count,
1469                                                 ZFCP_MAX_SBALS_PER_CT_REQ);
1470                 if (bytes <= 0) {
1471                         ZFCP_LOG_INFO("error: creation of CT request failed "
1472                                       "on adapter %s\n",
1473                                       zfcp_get_busid_by_adapter(adapter));
1474                         if (bytes == 0)
1475                                 ret = -ENOMEM;
1476                         else
1477                                 ret = bytes;
1478
1479                         goto failed_send;
1480                 }
1481                 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1482         } else {
1483                 /* reject send generic request */
1484                 ZFCP_LOG_INFO(
1485                         "error: microcode does not support chained SBALs,"
1486                         "CT request too big (adapter %s)\n",
1487                         zfcp_get_busid_by_adapter(adapter));
1488                 ret = -EOPNOTSUPP;
1489                 goto failed_send;
1490         }
1491
1492         /* settings in QTCB */
1493         fsf_req->qtcb->header.port_handle = port->handle;
1494         fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1495         fsf_req->qtcb->bottom.support.timeout = ct->timeout;
1496         fsf_req->data.send_ct = ct;
1497
1498         /* start QDIO request for this FSF request */
1499         ret = zfcp_fsf_req_send(fsf_req, ct->timer);
1500         if (ret) {
1501                 ZFCP_LOG_DEBUG("error: initiation of CT request failed "
1502                                "(adapter %s, port 0x%016Lx)\n",
1503                                zfcp_get_busid_by_adapter(adapter), port->wwpn);
1504                 goto failed_send;
1505         }
1506
1507         ZFCP_LOG_DEBUG("CT request initiated (adapter %s, port 0x%016Lx)\n",
1508                        zfcp_get_busid_by_adapter(adapter), port->wwpn);
1509         goto out;
1510
1511  failed_send:
1512         zfcp_fsf_req_free(fsf_req);
1513         if (erp_action != NULL) {
1514                 erp_action->fsf_req = NULL;
1515         }
1516  failed_req:
1517  out:
1518         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1519                                 lock_flags);
1520         return ret;
1521 }
1522
1523 /**
1524  * zfcp_fsf_send_ct_handler - handler for Generic Service requests
1525  * @fsf_req: pointer to struct zfcp_fsf_req
1526  *
1527  * Data specific for the Generic Service request is passed by
1528  * fsf_req->data.send_ct
1529  * Usually a specific handler for the request is called via
1530  * fsf_req->data.send_ct->handler at end of this function.
1531  */
1532 static int
1533 zfcp_fsf_send_ct_handler(struct zfcp_fsf_req *fsf_req)
1534 {
1535         struct zfcp_port *port;
1536         struct zfcp_adapter *adapter;
1537         struct zfcp_send_ct *send_ct;
1538         struct fsf_qtcb_header *header;
1539         struct fsf_qtcb_bottom_support *bottom;
1540         int retval = -EINVAL;
1541         u16 subtable, rule, counter;
1542
1543         adapter = fsf_req->adapter;
1544         send_ct = fsf_req->data.send_ct;
1545         port = send_ct->port;
1546         header = &fsf_req->qtcb->header;
1547         bottom = &fsf_req->qtcb->bottom.support;
1548
1549         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1550                 goto skip_fsfstatus;
1551
1552         /* evaluate FSF status in QTCB */
1553         switch (header->fsf_status) {
1554
1555         case FSF_GOOD:
1556                 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
1557                 retval = 0;
1558                 break;
1559
1560         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1561                 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1562                 if (adapter->fc_service_class <= 3) {
1563                         ZFCP_LOG_INFO("error: adapter %s does not support fc "
1564                                       "class %d.\n",
1565                                       zfcp_get_busid_by_port(port),
1566                                       adapter->fc_service_class);
1567                 } else {
1568                         ZFCP_LOG_INFO("bug: The fibre channel class at the "
1569                                       "adapter %s is invalid. "
1570                                       "(debug info %d)\n",
1571                                       zfcp_get_busid_by_port(port),
1572                                       adapter->fc_service_class);
1573                 }
1574                 /* stop operation for this adapter */
1575                 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1576                 zfcp_erp_adapter_shutdown(adapter, 0);
1577                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1578                 break;
1579
1580         case FSF_ADAPTER_STATUS_AVAILABLE:
1581                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1582                 switch (header->fsf_status_qual.word[0]){
1583                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1584                         ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1585                         /* reopening link to port */
1586                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1587                         zfcp_test_link(port);
1588                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1589                         break;
1590                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1591                         ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1592                         /* ERP strategy will escalate */
1593                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1594                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1595                         break;
1596                 default:
1597                         ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x "
1598                                       "arrived.\n",
1599                                       header->fsf_status_qual.word[0]);
1600                         break;
1601                 }
1602                 break;
1603
1604         case FSF_ACCESS_DENIED:
1605                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1606                 ZFCP_LOG_NORMAL("access denied, cannot send generic service "
1607                                 "command (adapter %s, port d_id=0x%08x)\n",
1608                                 zfcp_get_busid_by_port(port), port->d_id);
1609                 for (counter = 0; counter < 2; counter++) {
1610                         subtable = header->fsf_status_qual.halfword[counter * 2];
1611                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1612                         switch (subtable) {
1613                         case FSF_SQ_CFDC_SUBTABLE_OS:
1614                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1615                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1616                         case FSF_SQ_CFDC_SUBTABLE_LUN:
1617                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1618                                         zfcp_act_subtable_type[subtable], rule);
1619                                 break;
1620                         }
1621                 }
1622                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
1623                 zfcp_erp_port_access_denied(port);
1624                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1625                 break;
1626
1627         case FSF_GENERIC_COMMAND_REJECTED:
1628                 ZFCP_LOG_FLAGS(2, "FSF_GENERIC_COMMAND_REJECTED\n");
1629                 ZFCP_LOG_INFO("generic service command rejected "
1630                               "(adapter %s, port d_id=0x%08x)\n",
1631                               zfcp_get_busid_by_port(port), port->d_id);
1632                 ZFCP_LOG_INFO("status qualifier:\n");
1633                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1634                               (char *) &header->fsf_status_qual,
1635                               sizeof (union fsf_status_qual));
1636                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_gcom_rej");
1637                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1638                 break;
1639
1640         case FSF_PORT_HANDLE_NOT_VALID:
1641                 ZFCP_LOG_FLAGS(2, "FSF_PORT_HANDLE_NOT_VALID\n");
1642                 ZFCP_LOG_DEBUG("Temporary port identifier 0x%x for port "
1643                                "0x%016Lx on adapter %s invalid. This may "
1644                                "happen occasionally.\n", port->handle,
1645                                port->wwpn, zfcp_get_busid_by_port(port));
1646                 ZFCP_LOG_INFO("status qualifier:\n");
1647                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1648                               (char *) &header->fsf_status_qual,
1649                               sizeof (union fsf_status_qual));
1650                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_phandle_nv");
1651                 zfcp_erp_adapter_reopen(adapter, 0);
1652                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1653                 break;
1654
1655         case FSF_PORT_BOXED:
1656                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
1657                 ZFCP_LOG_INFO("port needs to be reopened "
1658                               "(adapter %s, port d_id=0x%08x)\n",
1659                               zfcp_get_busid_by_port(port), port->d_id);
1660                 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
1661                 zfcp_erp_port_reopen(port, 0);
1662                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
1663                     | ZFCP_STATUS_FSFREQ_RETRY;
1664                 break;
1665
1666         /* following states should never occure, all cases avoided
1667            in zfcp_fsf_send_ct - but who knows ... */
1668         case FSF_PAYLOAD_SIZE_MISMATCH:
1669                 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1670                 ZFCP_LOG_INFO("payload size mismatch (adapter: %s, "
1671                               "req_buf_length=%d, resp_buf_length=%d)\n",
1672                               zfcp_get_busid_by_adapter(adapter),
1673                               bottom->req_buf_length, bottom->resp_buf_length);
1674                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1675                 break;
1676         case FSF_REQUEST_SIZE_TOO_LARGE:
1677                 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1678                 ZFCP_LOG_INFO("request size too large (adapter: %s, "
1679                               "req_buf_length=%d)\n",
1680                               zfcp_get_busid_by_adapter(adapter),
1681                               bottom->req_buf_length);
1682                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1683                 break;
1684         case FSF_RESPONSE_SIZE_TOO_LARGE:
1685                 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1686                 ZFCP_LOG_INFO("response size too large (adapter: %s, "
1687                               "resp_buf_length=%d)\n",
1688                               zfcp_get_busid_by_adapter(adapter),
1689                               bottom->resp_buf_length);
1690                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1691                 break;
1692         case FSF_SBAL_MISMATCH:
1693                 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1694                 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1695                               "resp_buf_length=%d)\n",
1696                               zfcp_get_busid_by_adapter(adapter),
1697                               bottom->req_buf_length, bottom->resp_buf_length);
1698                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1699                 break;
1700
1701        default:
1702                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
1703                                 "(debug info 0x%x)\n", header->fsf_status);
1704                 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval:");
1705                 debug_exception(adapter->erp_dbf, 0,
1706                                 &header->fsf_status_qual.word[0], sizeof (u32));
1707                 break;
1708         }
1709
1710 skip_fsfstatus:
1711         send_ct->status = retval;
1712
1713         if (send_ct->handler != NULL)
1714                 send_ct->handler(send_ct->handler_data);
1715
1716         return retval;
1717 }
1718
1719 /**
1720  * zfcp_fsf_send_els - initiate an ELS command (FC-FS)
1721  * @els: pointer to struct zfcp_send_els which contains all needed data for
1722  *      the command.
1723  */
1724 int
1725 zfcp_fsf_send_els(struct zfcp_send_els *els)
1726 {
1727         volatile struct qdio_buffer_element *sbale;
1728         struct zfcp_fsf_req *fsf_req;
1729         fc_id_t d_id;
1730         struct zfcp_adapter *adapter;
1731         unsigned long lock_flags;
1732         int bytes;
1733         int ret = 0;
1734
1735         d_id = els->d_id;
1736         adapter = els->adapter;
1737
1738         ret = zfcp_fsf_req_create(adapter, FSF_QTCB_SEND_ELS,
1739                                   ZFCP_REQ_AUTO_CLEANUP,
1740                                   NULL, &lock_flags, &fsf_req);
1741         if (ret < 0) {
1742                 ZFCP_LOG_INFO("error: creation of ELS request failed "
1743                               "(adapter %s, port d_id: 0x%08x)\n",
1744                               zfcp_get_busid_by_adapter(adapter), d_id);
1745                 goto failed_req;
1746         }
1747
1748         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1749         if (zfcp_use_one_sbal(els->req, els->req_count,
1750                               els->resp, els->resp_count)){
1751                 /* both request buffer and response buffer
1752                    fit into one sbale each */
1753                 sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ;
1754                 sbale[2].addr = zfcp_sg_to_address(&els->req[0]);
1755                 sbale[2].length = els->req[0].length;
1756                 sbale[3].addr = zfcp_sg_to_address(&els->resp[0]);
1757                 sbale[3].length = els->resp[0].length;
1758                 sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY;
1759         } else if (adapter->supported_features &
1760                    FSF_FEATURE_ELS_CT_CHAINED_SBALS) {
1761                 /* try to use chained SBALs */
1762                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1763                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1764                                                 els->req, els->req_count,
1765                                                 ZFCP_MAX_SBALS_PER_ELS_REQ);
1766                 if (bytes <= 0) {
1767                         ZFCP_LOG_INFO("error: creation of ELS request failed "
1768                                       "(adapter %s, port d_id: 0x%08x)\n",
1769                                       zfcp_get_busid_by_adapter(adapter), d_id);
1770                         if (bytes == 0) {
1771                                 ret = -ENOMEM;
1772                         } else {
1773                                 ret = bytes;
1774                         }
1775                         goto failed_send;
1776                 }
1777                 fsf_req->qtcb->bottom.support.req_buf_length = bytes;
1778                 fsf_req->sbale_curr = ZFCP_LAST_SBALE_PER_SBAL;
1779                 bytes = zfcp_qdio_sbals_from_sg(fsf_req,
1780                                                 SBAL_FLAGS0_TYPE_WRITE_READ,
1781                                                 els->resp, els->resp_count,
1782                                                 ZFCP_MAX_SBALS_PER_ELS_REQ);
1783                 if (bytes <= 0) {
1784                         ZFCP_LOG_INFO("error: creation of ELS request failed "
1785                                       "(adapter %s, port d_id: 0x%08x)\n",
1786                                       zfcp_get_busid_by_adapter(adapter), d_id);
1787                         if (bytes == 0) {
1788                                 ret = -ENOMEM;
1789                         } else {
1790                                 ret = bytes;
1791                         }
1792                         goto failed_send;
1793                 }
1794                 fsf_req->qtcb->bottom.support.resp_buf_length = bytes;
1795         } else {
1796                 /* reject request */
1797                 ZFCP_LOG_INFO("error: microcode does not support chained SBALs"
1798                               ", ELS request too big (adapter %s, "
1799                               "port d_id: 0x%08x)\n",
1800                               zfcp_get_busid_by_adapter(adapter), d_id);
1801                 ret = -EOPNOTSUPP;
1802                 goto failed_send;
1803         }
1804
1805         /* settings in QTCB */
1806         fsf_req->qtcb->bottom.support.d_id = d_id;
1807         fsf_req->qtcb->bottom.support.service_class = adapter->fc_service_class;
1808         fsf_req->qtcb->bottom.support.timeout = ZFCP_ELS_TIMEOUT;
1809         fsf_req->data.send_els = els;
1810
1811         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
1812
1813         /* start QDIO request for this FSF request */
1814         ret = zfcp_fsf_req_send(fsf_req, els->timer);
1815         if (ret) {
1816                 ZFCP_LOG_DEBUG("error: initiation of ELS request failed "
1817                                "(adapter %s, port d_id: 0x%08x)\n",
1818                                zfcp_get_busid_by_adapter(adapter), d_id);
1819                 goto failed_send;
1820         }
1821
1822         ZFCP_LOG_DEBUG("ELS request initiated (adapter %s, port d_id: "
1823                        "0x%08x)\n", zfcp_get_busid_by_adapter(adapter), d_id);
1824         goto out;
1825
1826  failed_send:
1827         zfcp_fsf_req_free(fsf_req);
1828
1829  failed_req:
1830  out:
1831         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
1832                                 lock_flags);
1833
1834         return ret;
1835 }
1836
1837 /**
1838  * zfcp_fsf_send_els_handler - handler for ELS commands
1839  * @fsf_req: pointer to struct zfcp_fsf_req
1840  *
1841  * Data specific for the ELS command is passed by
1842  * fsf_req->data.send_els
1843  * Usually a specific handler for the command is called via
1844  * fsf_req->data.send_els->handler at end of this function.
1845  */
1846 static int zfcp_fsf_send_els_handler(struct zfcp_fsf_req *fsf_req)
1847 {
1848         struct zfcp_adapter *adapter;
1849         fc_id_t d_id;
1850         struct zfcp_port *port;
1851         struct fsf_qtcb_header *header;
1852         struct fsf_qtcb_bottom_support *bottom;
1853         struct zfcp_send_els *send_els;
1854         int retval = -EINVAL;
1855         u16 subtable, rule, counter;
1856
1857         send_els = fsf_req->data.send_els;
1858         adapter = send_els->adapter;
1859         d_id = send_els->d_id;
1860         header = &fsf_req->qtcb->header;
1861         bottom = &fsf_req->qtcb->bottom.support;
1862
1863         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
1864                 goto skip_fsfstatus;
1865
1866         switch (header->fsf_status) {
1867
1868         case FSF_GOOD:
1869                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
1870                 retval = 0;
1871                 break;
1872
1873         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
1874                 ZFCP_LOG_FLAGS(2, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
1875                 if (adapter->fc_service_class <= 3) {
1876                         ZFCP_LOG_INFO("error: adapter %s does "
1877                                       "not support fibrechannel class %d.\n",
1878                                       zfcp_get_busid_by_adapter(adapter),
1879                                       adapter->fc_service_class);
1880                 } else {
1881                         ZFCP_LOG_INFO("bug: The fibrechannel class at "
1882                                       "adapter %s is invalid. "
1883                                       "(debug info %d)\n",
1884                                       zfcp_get_busid_by_adapter(adapter),
1885                                       adapter->fc_service_class);
1886                 }
1887                 /* stop operation for this adapter */
1888                 debug_text_exception(adapter->erp_dbf, 0, "fsf_s_class_nsup");
1889                 zfcp_erp_adapter_shutdown(adapter, 0);
1890                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1891                 break;
1892
1893         case FSF_ADAPTER_STATUS_AVAILABLE:
1894                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
1895                 switch (header->fsf_status_qual.word[0]){
1896                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
1897                         ZFCP_LOG_FLAGS(2,"FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
1898                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ltest");
1899                         if (send_els->ls_code != ZFCP_LS_ADISC) {
1900                                 read_lock(&zfcp_data.config_lock);
1901                                 port = zfcp_get_port_by_did(adapter, d_id);
1902                                 if (port)
1903                                         zfcp_test_link(port);
1904                                 read_unlock(&zfcp_data.config_lock);
1905                         }
1906                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1907                         break;
1908                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
1909                         ZFCP_LOG_FLAGS(2,"FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
1910                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_ulp");
1911                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1912                         retval =
1913                           zfcp_handle_els_rjt(header->fsf_status_qual.word[1],
1914                                               (struct zfcp_ls_rjt_par *)
1915                                               &header->fsf_status_qual.word[2]);
1916                         break;
1917                 case FSF_SQ_RETRY_IF_POSSIBLE:
1918                         ZFCP_LOG_FLAGS(2, "FSF_SQ_RETRY_IF_POSSIBLE\n");
1919                         debug_text_event(adapter->erp_dbf, 1, "fsf_sq_retry");
1920                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1921                         break;
1922                 default:
1923                         ZFCP_LOG_INFO("bug: Wrong status qualifier 0x%x\n",
1924                                       header->fsf_status_qual.word[0]);
1925                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_INFO,
1926                                 (char*)header->fsf_status_qual.word, 16);
1927                 }
1928                 break;
1929
1930         case FSF_ELS_COMMAND_REJECTED:
1931                 ZFCP_LOG_FLAGS(2, "FSF_ELS_COMMAND_REJECTED\n");
1932                 ZFCP_LOG_INFO("ELS has been rejected because command filter "
1933                               "prohibited sending "
1934                               "(adapter: %s, port d_id: 0x%08x)\n",
1935                               zfcp_get_busid_by_adapter(adapter), d_id);
1936
1937                 break;
1938
1939         case FSF_PAYLOAD_SIZE_MISMATCH:
1940                 ZFCP_LOG_FLAGS(2, "FSF_PAYLOAD_SIZE_MISMATCH\n");
1941                 ZFCP_LOG_INFO(
1942                         "ELS request size and ELS response size must be either "
1943                         "both 0, or both greater than 0 "
1944                         "(adapter: %s, req_buf_length=%d resp_buf_length=%d)\n",
1945                         zfcp_get_busid_by_adapter(adapter),
1946                         bottom->req_buf_length,
1947                         bottom->resp_buf_length);
1948                 break;
1949
1950         case FSF_REQUEST_SIZE_TOO_LARGE:
1951                 ZFCP_LOG_FLAGS(2, "FSF_REQUEST_SIZE_TOO_LARGE\n");
1952                 ZFCP_LOG_INFO(
1953                         "Length of the ELS request buffer, "
1954                         "specified in QTCB bottom, "
1955                         "exceeds the size of the buffers "
1956                         "that have been allocated for ELS request data "
1957                         "(adapter: %s, req_buf_length=%d)\n",
1958                         zfcp_get_busid_by_adapter(adapter),
1959                         bottom->req_buf_length);
1960                 break;
1961
1962         case FSF_RESPONSE_SIZE_TOO_LARGE:
1963                 ZFCP_LOG_FLAGS(2, "FSF_RESPONSE_SIZE_TOO_LARGE\n");
1964                 ZFCP_LOG_INFO(
1965                         "Length of the ELS response buffer, "
1966                         "specified in QTCB bottom, "
1967                         "exceeds the size of the buffers "
1968                         "that have been allocated for ELS response data "
1969                         "(adapter: %s, resp_buf_length=%d)\n",
1970                         zfcp_get_busid_by_adapter(adapter),
1971                         bottom->resp_buf_length);
1972                 break;
1973
1974         case FSF_SBAL_MISMATCH:
1975                 /* should never occure, avoided in zfcp_fsf_send_els */
1976                 ZFCP_LOG_FLAGS(2, "FSF_SBAL_MISMATCH\n");
1977                 ZFCP_LOG_INFO("SBAL mismatch (adapter: %s, req_buf_length=%d, "
1978                               "resp_buf_length=%d)\n",
1979                               zfcp_get_busid_by_adapter(adapter),
1980                               bottom->req_buf_length, bottom->resp_buf_length);
1981                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
1982                 break;
1983
1984         case FSF_ACCESS_DENIED:
1985                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
1986                 ZFCP_LOG_NORMAL("access denied, cannot send ELS command "
1987                                 "(adapter %s, port d_id=0x%08x)\n",
1988                                 zfcp_get_busid_by_adapter(adapter), d_id);
1989                 for (counter = 0; counter < 2; counter++) {
1990                         subtable = header->fsf_status_qual.halfword[counter * 2];
1991                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
1992                         switch (subtable) {
1993                         case FSF_SQ_CFDC_SUBTABLE_OS:
1994                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
1995                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
1996                         case FSF_SQ_CFDC_SUBTABLE_LUN:
1997                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
1998                                         zfcp_act_subtable_type[subtable], rule);
1999                                 break;
2000                         }
2001                 }
2002                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
2003                 read_lock(&zfcp_data.config_lock);
2004                 port = zfcp_get_port_by_did(adapter, d_id);
2005                 if (port != NULL)
2006                         zfcp_erp_port_access_denied(port);
2007                 read_unlock(&zfcp_data.config_lock);
2008                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2009                 break;
2010
2011         default:
2012                 ZFCP_LOG_NORMAL(
2013                         "bug: An unknown FSF Status was presented "
2014                         "(adapter: %s, fsf_status=0x%08x)\n",
2015                         zfcp_get_busid_by_adapter(adapter),
2016                         header->fsf_status);
2017                 debug_text_event(adapter->erp_dbf, 0, "fsf_sq_inval");
2018                 debug_exception(adapter->erp_dbf, 0,
2019                         &header->fsf_status_qual.word[0], sizeof(u32));
2020                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2021                 break;
2022         }
2023
2024 skip_fsfstatus:
2025         send_els->status = retval;
2026
2027         if (send_els->handler != 0)
2028                 send_els->handler(send_els->handler_data);
2029
2030         return retval;
2031 }
2032
2033 /*
2034  * function:
2035  *
2036  * purpose:
2037  *
2038  * returns:     address of initiated FSF request
2039  *              NULL - request could not be initiated
2040  */
2041 int
2042 zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action)
2043 {
2044         volatile struct qdio_buffer_element *sbale;
2045         unsigned long lock_flags;
2046         int retval = 0;
2047
2048         /* setup new FSF request */
2049         retval = zfcp_fsf_req_create(erp_action->adapter,
2050                                      FSF_QTCB_EXCHANGE_CONFIG_DATA,
2051                                      ZFCP_REQ_AUTO_CLEANUP,
2052                                      erp_action->adapter->pool.fsf_req_erp,
2053                                      &lock_flags, &(erp_action->fsf_req));
2054         if (retval < 0) {
2055                 ZFCP_LOG_INFO("error: Could not create exchange configuration "
2056                               "data request for adapter %s.\n",
2057                               zfcp_get_busid_by_adapter(erp_action->adapter));
2058                 goto out;
2059         }
2060
2061         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2062                                     erp_action->fsf_req->sbal_curr, 0);
2063         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2064         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2065
2066         erp_action->fsf_req->erp_action = erp_action;
2067         erp_action->fsf_req->qtcb->bottom.config.feature_selection =
2068                 (FSF_FEATURE_CFDC | FSF_FEATURE_LUN_SHARING);
2069
2070         /* start QDIO request for this FSF request */
2071         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2072         if (retval) {
2073                 ZFCP_LOG_INFO
2074                     ("error: Could not send exchange configuration data "
2075                      "command on the adapter %s\n",
2076                      zfcp_get_busid_by_adapter(erp_action->adapter));
2077                 zfcp_fsf_req_free(erp_action->fsf_req);
2078                 erp_action->fsf_req = NULL;
2079                 goto out;
2080         }
2081
2082         ZFCP_LOG_DEBUG("exchange configuration data request initiated "
2083                        "(adapter %s)\n",
2084                        zfcp_get_busid_by_adapter(erp_action->adapter));
2085
2086  out:
2087         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2088                                 lock_flags);
2089         return retval;
2090 }
2091
2092 /**
2093  * zfcp_fsf_exchange_config_evaluate
2094  * @fsf_req: fsf_req which belongs to xchg config data request
2095  * @xchg_ok: specifies if xchg config data was incomplete or complete (0/1)
2096  *
2097  * returns: -EIO on error, 0 otherwise
2098  */
2099 static int
2100 zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *fsf_req, int xchg_ok)
2101 {
2102         struct fsf_qtcb_bottom_config *bottom;
2103         struct zfcp_adapter *adapter = fsf_req->adapter;
2104
2105         bottom = &fsf_req->qtcb->bottom.config;
2106         ZFCP_LOG_DEBUG("low/high QTCB version 0x%x/0x%x of FSF\n",
2107                        bottom->low_qtcb_version, bottom->high_qtcb_version);
2108         adapter->fsf_lic_version = bottom->lic_version;
2109         adapter->supported_features = bottom->supported_features;
2110
2111         if (xchg_ok) {
2112                 adapter->wwnn = bottom->nport_serv_param.wwnn;
2113                 adapter->wwpn = bottom->nport_serv_param.wwpn;
2114                 adapter->s_id = bottom->s_id & ZFCP_DID_MASK;
2115                 adapter->fc_topology = bottom->fc_topology;
2116                 adapter->fc_link_speed = bottom->fc_link_speed;
2117                 adapter->hydra_version = bottom->adapter_type;
2118         } else {
2119                 adapter->wwnn = 0;
2120                 adapter->wwpn = 0;
2121                 adapter->s_id = 0;
2122                 adapter->fc_topology = 0;
2123                 adapter->fc_link_speed = 0;
2124                 adapter->hydra_version = 0;
2125         }
2126
2127         if(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT){
2128                 adapter->hardware_version = bottom->hardware_version;
2129                 memcpy(adapter->serial_number, bottom->serial_number, 17);
2130                 EBCASC(adapter->serial_number, sizeof(adapter->serial_number));
2131         }
2132
2133         ZFCP_LOG_INFO("The adapter %s reported the following characteristics:\n"
2134                       "WWNN 0x%016Lx, "
2135                       "WWPN 0x%016Lx, "
2136                       "S_ID 0x%08x,\n"
2137                       "adapter version 0x%x, "
2138                       "LIC version 0x%x, "
2139                       "FC link speed %d Gb/s\n",
2140                       zfcp_get_busid_by_adapter(adapter),
2141                       adapter->wwnn,
2142                       adapter->wwpn,
2143                       (unsigned int) adapter->s_id,
2144                       adapter->hydra_version,
2145                       adapter->fsf_lic_version,
2146                       adapter->fc_link_speed);
2147         if (ZFCP_QTCB_VERSION < bottom->low_qtcb_version) {
2148                 ZFCP_LOG_NORMAL("error: the adapter %s "
2149                                 "only supports newer control block "
2150                                 "versions in comparison to this device "
2151                                 "driver (try updated device driver)\n",
2152                                 zfcp_get_busid_by_adapter(adapter));
2153                 debug_text_event(adapter->erp_dbf, 0, "low_qtcb_ver");
2154                 zfcp_erp_adapter_shutdown(adapter, 0);
2155                 return -EIO;
2156         }
2157         if (ZFCP_QTCB_VERSION > bottom->high_qtcb_version) {
2158                 ZFCP_LOG_NORMAL("error: the adapter %s "
2159                                 "only supports older control block "
2160                                 "versions than this device driver uses"
2161                                 "(consider a microcode upgrade)\n",
2162                                 zfcp_get_busid_by_adapter(adapter));
2163                 debug_text_event(adapter->erp_dbf, 0, "high_qtcb_ver");
2164                 zfcp_erp_adapter_shutdown(adapter, 0);
2165                 return -EIO;
2166         }
2167         return 0;
2168 }
2169
2170 /*
2171  * function:    zfcp_fsf_exchange_config_data_handler
2172  *
2173  * purpose:     is called for finished Exchange Configuration Data command
2174  *
2175  * returns:
2176  */
2177 static int
2178 zfcp_fsf_exchange_config_data_handler(struct zfcp_fsf_req *fsf_req)
2179 {
2180         struct fsf_qtcb_bottom_config *bottom;
2181         struct zfcp_adapter *adapter = fsf_req->adapter;
2182
2183         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2184                 return -EIO;
2185
2186         switch (fsf_req->qtcb->header.fsf_status) {
2187
2188         case FSF_GOOD:
2189                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
2190
2191                 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 1))
2192                         return -EIO;
2193
2194                 switch (adapter->fc_topology) {
2195                 case FSF_TOPO_P2P:
2196                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_P2P\n");
2197                         ZFCP_LOG_NORMAL("error: Point-to-point fibrechannel "
2198                                         "configuration detected at adapter %s "
2199                                         "unsupported, shutting down adapter\n",
2200                                         zfcp_get_busid_by_adapter(adapter));
2201                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2202                                          "top-p-to-p");
2203                         zfcp_erp_adapter_shutdown(adapter, 0);
2204                         return -EIO;
2205                 case FSF_TOPO_AL:
2206                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_AL\n");
2207                         ZFCP_LOG_NORMAL("error: Arbitrated loop fibrechannel "
2208                                         "topology detected at adapter %s "
2209                                         "unsupported, shutting down adapter\n",
2210                                         zfcp_get_busid_by_adapter(adapter));
2211                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2212                                          "top-al");
2213                         zfcp_erp_adapter_shutdown(adapter, 0);
2214                         return -EIO;
2215                 case FSF_TOPO_FABRIC:
2216                         ZFCP_LOG_FLAGS(1, "FSF_TOPO_FABRIC\n");
2217                         ZFCP_LOG_INFO("Switched fabric fibrechannel "
2218                                       "network detected at adapter %s.\n",
2219                                       zfcp_get_busid_by_adapter(adapter));
2220                         break;
2221                 default:
2222                         ZFCP_LOG_NORMAL("bug: The fibrechannel topology "
2223                                         "reported by the exchange "
2224                                         "configuration command for "
2225                                         "the adapter %s is not "
2226                                         "of a type known to the zfcp "
2227                                         "driver, shutting down adapter\n",
2228                                         zfcp_get_busid_by_adapter(adapter));
2229                         debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2230                                              "unknown-topo");
2231                         zfcp_erp_adapter_shutdown(adapter, 0);
2232                         return -EIO;
2233                 }
2234                 bottom = &fsf_req->qtcb->bottom.config;
2235                 if (bottom->max_qtcb_size < sizeof(struct fsf_qtcb)) {
2236                         ZFCP_LOG_NORMAL("bug: Maximum QTCB size (%d bytes) "
2237                                         "allowed by the adapter %s "
2238                                         "is lower than the minimum "
2239                                         "required by the driver (%ld bytes).\n",
2240                                         bottom->max_qtcb_size,
2241                                         zfcp_get_busid_by_adapter(adapter),
2242                                         sizeof(struct fsf_qtcb));
2243                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2244                                          "qtcb-size");
2245                         debug_event(fsf_req->adapter->erp_dbf, 0,
2246                                     &bottom->max_qtcb_size, sizeof (u32));
2247                         zfcp_erp_adapter_shutdown(adapter, 0);
2248                         return -EIO;
2249                 }
2250                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK,
2251                                 &adapter->status);
2252                 break;
2253         case FSF_EXCHANGE_CONFIG_DATA_INCOMPLETE:
2254                 debug_text_event(adapter->erp_dbf, 0, "xchg-inco");
2255
2256                 if (zfcp_fsf_exchange_config_evaluate(fsf_req, 0))
2257                         return -EIO;
2258
2259                 ZFCP_LOG_INFO("Local link to adapter %s is down\n",
2260                               zfcp_get_busid_by_adapter(adapter));
2261                 atomic_set_mask(ZFCP_STATUS_ADAPTER_XCONFIG_OK |
2262                                 ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED,
2263                                 &adapter->status);
2264                 zfcp_erp_adapter_failed(adapter);
2265                 break;
2266         default:
2267                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf-stat-ng");
2268                 debug_event(fsf_req->adapter->erp_dbf, 0,
2269                             &fsf_req->qtcb->header.fsf_status, sizeof (u32));
2270                 zfcp_erp_adapter_shutdown(adapter, 0);
2271                 return -EIO;
2272         }
2273         return 0;
2274 }
2275
2276 /**
2277  * zfcp_fsf_exchange_port_data - request information about local port
2278  * @adapter: for which port data is requested
2279  * @data: response to exchange port data request
2280  */
2281 int
2282 zfcp_fsf_exchange_port_data(struct zfcp_adapter *adapter,
2283                             struct fsf_qtcb_bottom_port *data)
2284 {
2285         volatile struct qdio_buffer_element *sbale;
2286         int retval = 0;
2287         unsigned long lock_flags;
2288         struct zfcp_fsf_req *fsf_req;
2289         struct timer_list *timer;
2290
2291         if(!(adapter->supported_features & FSF_FEATURE_HBAAPI_MANAGEMENT)){
2292                 ZFCP_LOG_INFO("error: exchange port data "
2293                               "command not supported by adapter %s\n",
2294                               zfcp_get_busid_by_adapter(adapter));
2295                 return -EOPNOTSUPP;
2296         }
2297
2298         timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
2299         if (!timer)
2300                 return -ENOMEM;
2301
2302         /* setup new FSF request */
2303         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_EXCHANGE_PORT_DATA,
2304                                      0, 0, &lock_flags, &fsf_req);
2305         if (retval < 0) {
2306                 ZFCP_LOG_INFO("error: Out of resources. Could not create an "
2307                               "exchange port data request for"
2308                               "the adapter %s.\n",
2309                               zfcp_get_busid_by_adapter(adapter));
2310                 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2311                                         lock_flags);
2312                 goto out;
2313         }
2314
2315         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
2316         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2317         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2318
2319         fsf_req->data.port_data = data;
2320
2321         init_timer(timer);
2322         timer->function = zfcp_fsf_request_timeout_handler;
2323         timer->data = (unsigned long) adapter;
2324         timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
2325
2326         retval = zfcp_fsf_req_send(fsf_req, timer);
2327         if (retval) {
2328                 ZFCP_LOG_INFO("error: Could not send an exchange port data "
2329                               "command on the adapter %s\n",
2330                               zfcp_get_busid_by_adapter(adapter));
2331                 zfcp_fsf_req_free(fsf_req);
2332                 write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2333                                         lock_flags);
2334                 goto out;
2335         }
2336
2337         ZFCP_LOG_DEBUG("Exchange Port Data request initiated (adapter %s)\n",
2338                        zfcp_get_busid_by_adapter(adapter));
2339
2340         write_unlock_irqrestore(&adapter->request_queue.queue_lock,
2341                                 lock_flags);
2342
2343         wait_event(fsf_req->completion_wq,
2344                    fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
2345         del_timer_sync(timer);
2346         zfcp_fsf_req_cleanup(fsf_req);
2347  out:
2348         kfree(timer);
2349         return retval;
2350 }
2351
2352
2353 /**
2354  * zfcp_fsf_exchange_port_data_handler - handler for exchange_port_data request
2355  * @fsf_req: pointer to struct zfcp_fsf_req
2356  */
2357 static void
2358 zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *fsf_req)
2359 {
2360         struct fsf_qtcb_bottom_port *bottom;
2361         struct fsf_qtcb_bottom_port *data = fsf_req->data.port_data;
2362
2363         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)
2364                 return;
2365
2366         switch (fsf_req->qtcb->header.fsf_status) {
2367         case FSF_GOOD:
2368                 ZFCP_LOG_FLAGS(2,"FSF_GOOD\n");
2369                 bottom = &fsf_req->qtcb->bottom.port;
2370                 memcpy(data, bottom, sizeof(*data));
2371                 break;
2372
2373         default:
2374                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "xchg-port-ng");
2375                 debug_event(fsf_req->adapter->erp_dbf, 0,
2376                             &fsf_req->qtcb->header.fsf_status, sizeof(u32));
2377         }
2378 }
2379
2380
2381 /*
2382  * function:    zfcp_fsf_open_port
2383  *
2384  * purpose:
2385  *
2386  * returns:     address of initiated FSF request
2387  *              NULL - request could not be initiated
2388  */
2389 int
2390 zfcp_fsf_open_port(struct zfcp_erp_action *erp_action)
2391 {
2392         volatile struct qdio_buffer_element *sbale;
2393         unsigned long lock_flags;
2394         int retval = 0;
2395
2396         /* setup new FSF request */
2397         retval = zfcp_fsf_req_create(erp_action->adapter,
2398                                      FSF_QTCB_OPEN_PORT_WITH_DID,
2399                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2400                                      erp_action->adapter->pool.fsf_req_erp,
2401                                      &lock_flags, &(erp_action->fsf_req));
2402         if (retval < 0) {
2403                 ZFCP_LOG_INFO("error: Could not create open port request "
2404                               "for port 0x%016Lx on adapter %s.\n",
2405                               erp_action->port->wwpn,
2406                               zfcp_get_busid_by_adapter(erp_action->adapter));
2407                 goto out;
2408         }
2409
2410         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2411                                     erp_action->fsf_req->sbal_curr, 0);
2412         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2413         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2414
2415         erp_action->fsf_req->qtcb->bottom.support.d_id = erp_action->port->d_id;
2416         atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->port->status);
2417         erp_action->fsf_req->data.open_port.port = erp_action->port;
2418         erp_action->fsf_req->erp_action = erp_action;
2419
2420         /* start QDIO request for this FSF request */
2421         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2422         if (retval) {
2423                 ZFCP_LOG_INFO("error: Could not send open port request for "
2424                               "port 0x%016Lx on adapter %s.\n",
2425                               erp_action->port->wwpn,
2426                               zfcp_get_busid_by_adapter(erp_action->adapter));
2427                 zfcp_fsf_req_free(erp_action->fsf_req);
2428                 erp_action->fsf_req = NULL;
2429                 goto out;
2430         }
2431
2432         ZFCP_LOG_DEBUG("open port request initiated "
2433                        "(adapter %s,  port 0x%016Lx)\n",
2434                        zfcp_get_busid_by_adapter(erp_action->adapter),
2435                        erp_action->port->wwpn);
2436  out:
2437         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2438                                 lock_flags);
2439         return retval;
2440 }
2441
2442 /*
2443  * function:    zfcp_fsf_open_port_handler
2444  *
2445  * purpose:     is called for finished Open Port command
2446  *
2447  * returns:
2448  */
2449 static int
2450 zfcp_fsf_open_port_handler(struct zfcp_fsf_req *fsf_req)
2451 {
2452         int retval = -EINVAL;
2453         struct zfcp_port *port;
2454         struct fsf_plogi *plogi;
2455         struct fsf_qtcb_header *header;
2456         u16 subtable, rule, counter;
2457
2458         port = fsf_req->data.open_port.port;
2459         header = &fsf_req->qtcb->header;
2460
2461         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2462                 /* don't change port status in our bookkeeping */
2463                 goto skip_fsfstatus;
2464         }
2465
2466         /* evaluate FSF status in QTCB */
2467         switch (header->fsf_status) {
2468
2469         case FSF_PORT_ALREADY_OPEN:
2470                 ZFCP_LOG_FLAGS(0, "FSF_PORT_ALREADY_OPEN\n");
2471                 ZFCP_LOG_NORMAL("bug: remote port 0x%016Lx on adapter %s "
2472                                 "is already open.\n",
2473                                 port->wwpn, zfcp_get_busid_by_port(port));
2474                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2475                                      "fsf_s_popen");
2476                 /*
2477                  * This is a bug, however operation should continue normally
2478                  * if it is simply ignored
2479                  */
2480                 break;
2481
2482         case FSF_ACCESS_DENIED:
2483                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2484                 ZFCP_LOG_NORMAL("Access denied, cannot open port 0x%016Lx "
2485                                 "on adapter %s\n",
2486                                 port->wwpn, zfcp_get_busid_by_port(port));
2487                 for (counter = 0; counter < 2; counter++) {
2488                         subtable = header->fsf_status_qual.halfword[counter * 2];
2489                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2490                         switch (subtable) {
2491                         case FSF_SQ_CFDC_SUBTABLE_OS:
2492                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2493                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2494                         case FSF_SQ_CFDC_SUBTABLE_LUN:
2495                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2496                                         zfcp_act_subtable_type[subtable], rule);
2497                                 break;
2498                         }
2499                 }
2500                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2501                 zfcp_erp_port_access_denied(port);
2502                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2503                 break;
2504
2505         case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
2506                 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED\n");
2507                 ZFCP_LOG_INFO("error: The FSF adapter is out of resources. "
2508                               "The remote port 0x%016Lx on adapter %s "
2509                               "could not be opened. Disabling it.\n",
2510                               port->wwpn, zfcp_get_busid_by_port(port));
2511                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2512                                  "fsf_s_max_ports");
2513                 zfcp_erp_port_failed(port);
2514                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2515                 break;
2516
2517         case FSF_ADAPTER_STATUS_AVAILABLE:
2518                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2519                 switch (header->fsf_status_qual.word[0]) {
2520                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2521                         ZFCP_LOG_FLAGS(2,
2522                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2523                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2524                                          "fsf_sq_ltest");
2525                         /* ERP strategy will escalate */
2526                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2527                         break;
2528                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2529                         /* ERP strategy will escalate */
2530                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2531                                          "fsf_sq_ulp");
2532                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2533                         break;
2534                 case FSF_SQ_NO_RETRY_POSSIBLE:
2535                         ZFCP_LOG_FLAGS(0, "FSF_SQ_NO_RETRY_POSSIBLE\n");
2536                         ZFCP_LOG_NORMAL("The remote port 0x%016Lx on "
2537                                         "adapter %s could not be opened. "
2538                                         "Disabling it.\n",
2539                                         port->wwpn,
2540                                         zfcp_get_busid_by_port(port));
2541                         debug_text_exception(fsf_req->adapter->erp_dbf, 0,
2542                                              "fsf_sq_no_retry");
2543                         zfcp_erp_port_failed(port);
2544                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2545                         break;
2546                 default:
2547                         ZFCP_LOG_NORMAL
2548                             ("bug: Wrong status qualifier 0x%x arrived.\n",
2549                              header->fsf_status_qual.word[0]);
2550                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2551                                          "fsf_sq_inval:");
2552                         debug_exception(
2553                                 fsf_req->adapter->erp_dbf, 0,
2554                                 &header->fsf_status_qual.word[0],
2555                                 sizeof (u32));
2556                         break;
2557                 }
2558                 break;
2559
2560         case FSF_GOOD:
2561                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2562                 /* save port handle assigned by FSF */
2563                 port->handle = header->port_handle;
2564                 ZFCP_LOG_INFO("The remote port 0x%016Lx via adapter %s "
2565                               "was opened, it's port handle is 0x%x\n",
2566                               port->wwpn, zfcp_get_busid_by_port(port),
2567                               port->handle);
2568                 /* mark port as open */
2569                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN |
2570                                 ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2571                 retval = 0;
2572                 /* check whether D_ID has changed during open */
2573                 /*
2574                  * FIXME: This check is not airtight, as the FCP channel does
2575                  * not monitor closures of target port connections caused on
2576                  * the remote side. Thus, they might miss out on invalidating
2577                  * locally cached WWPNs (and other N_Port parameters) of gone
2578                  * target ports. So, our heroic attempt to make things safe
2579                  * could be undermined by 'open port' response data tagged with
2580                  * obsolete WWPNs. Another reason to monitor potential
2581                  * connection closures ourself at least (by interpreting
2582                  * incoming ELS' and unsolicited status). It just crosses my
2583                  * mind that one should be able to cross-check by means of
2584                  * another GID_PN straight after a port has been opened.
2585                  * Alternately, an ADISC/PDISC ELS should suffice, as well.
2586                  */
2587                 plogi = (struct fsf_plogi *) fsf_req->qtcb->bottom.support.els;
2588                 if (!atomic_test_mask(ZFCP_STATUS_PORT_NO_WWPN, &port->status))
2589                 {
2590                         if (fsf_req->qtcb->bottom.support.els1_length <
2591                             ((((unsigned long) &plogi->serv_param.wwpn) -
2592                               ((unsigned long) plogi)) + sizeof (u64))) {
2593                                 ZFCP_LOG_INFO(
2594                                         "warning: insufficient length of "
2595                                         "PLOGI payload (%i)\n",
2596                                         fsf_req->qtcb->bottom.support.els1_length);
2597                                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
2598                                                  "fsf_s_short_plogi:");
2599                                 /* skip sanity check and assume wwpn is ok */
2600                         } else {
2601                                 if (plogi->serv_param.wwpn != port->wwpn) {
2602                                         ZFCP_LOG_INFO("warning: d_id of port "
2603                                                       "0x%016Lx changed during "
2604                                                       "open\n", port->wwpn);
2605                                         debug_text_event(
2606                                                 fsf_req->adapter->erp_dbf, 0,
2607                                                 "fsf_s_did_change:");
2608                                         atomic_clear_mask(
2609                                                 ZFCP_STATUS_PORT_DID_DID,
2610                                                 &port->status);
2611                                 } else
2612                                         port->wwnn = plogi->serv_param.wwnn;
2613                         }
2614                 }
2615                 break;
2616
2617         case FSF_UNKNOWN_OP_SUBTYPE:
2618                 /* should never occure, subtype not set in zfcp_fsf_open_port */
2619                 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
2620                 ZFCP_LOG_INFO("unknown operation subtype (adapter: %s, "
2621                               "op_subtype=0x%x)\n",
2622                               zfcp_get_busid_by_port(port),
2623                               fsf_req->qtcb->bottom.support.operation_subtype);
2624                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2625                 break;
2626
2627         default:
2628                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2629                                 "(debug info 0x%x)\n",
2630                                 header->fsf_status);
2631                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2632                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2633                                 &header->fsf_status, sizeof (u32));
2634                 break;
2635         }
2636
2637  skip_fsfstatus:
2638         atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &port->status);
2639         return retval;
2640 }
2641
2642 /*
2643  * function:    zfcp_fsf_close_port
2644  *
2645  * purpose:     submit FSF command "close port"
2646  *
2647  * returns:     address of initiated FSF request
2648  *              NULL - request could not be initiated
2649  */
2650 int
2651 zfcp_fsf_close_port(struct zfcp_erp_action *erp_action)
2652 {
2653         volatile struct qdio_buffer_element *sbale;
2654         unsigned long lock_flags;
2655         int retval = 0;
2656
2657         /* setup new FSF request */
2658         retval = zfcp_fsf_req_create(erp_action->adapter,
2659                                      FSF_QTCB_CLOSE_PORT,
2660                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2661                                      erp_action->adapter->pool.fsf_req_erp,
2662                                      &lock_flags, &(erp_action->fsf_req));
2663         if (retval < 0) {
2664                 ZFCP_LOG_INFO("error: Could not create a close port request "
2665                               "for port 0x%016Lx on adapter %s.\n",
2666                               erp_action->port->wwpn,
2667                               zfcp_get_busid_by_adapter(erp_action->adapter));
2668                 goto out;
2669         }
2670
2671         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2672                                     erp_action->fsf_req->sbal_curr, 0);
2673         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2674         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2675
2676         atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->port->status);
2677         erp_action->fsf_req->data.close_port.port = erp_action->port;
2678         erp_action->fsf_req->erp_action = erp_action;
2679         erp_action->fsf_req->qtcb->header.port_handle =
2680             erp_action->port->handle;
2681
2682         /* start QDIO request for this FSF request */
2683         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2684         if (retval) {
2685                 ZFCP_LOG_INFO("error: Could not send a close port request for "
2686                               "port 0x%016Lx on adapter %s.\n",
2687                               erp_action->port->wwpn,
2688                               zfcp_get_busid_by_adapter(erp_action->adapter));
2689                 zfcp_fsf_req_free(erp_action->fsf_req);
2690                 erp_action->fsf_req = NULL;
2691                 goto out;
2692         }
2693
2694         ZFCP_LOG_TRACE("close port request initiated "
2695                        "(adapter %s, port 0x%016Lx)\n",
2696                        zfcp_get_busid_by_adapter(erp_action->adapter),
2697                        erp_action->port->wwpn);
2698  out:
2699         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2700                                 lock_flags);
2701         return retval;
2702 }
2703
2704 /*
2705  * function:    zfcp_fsf_close_port_handler
2706  *
2707  * purpose:     is called for finished Close Port FSF command
2708  *
2709  * returns:
2710  */
2711 static int
2712 zfcp_fsf_close_port_handler(struct zfcp_fsf_req *fsf_req)
2713 {
2714         int retval = -EINVAL;
2715         struct zfcp_port *port;
2716
2717         port = fsf_req->data.close_port.port;
2718
2719         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2720                 /* don't change port status in our bookkeeping */
2721                 goto skip_fsfstatus;
2722         }
2723
2724         /* evaluate FSF status in QTCB */
2725         switch (fsf_req->qtcb->header.fsf_status) {
2726
2727         case FSF_PORT_HANDLE_NOT_VALID:
2728                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2729                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
2730                               "0x%016Lx on adapter %s invalid. This may happen "
2731                               "occasionally.\n", port->handle,
2732                               port->wwpn, zfcp_get_busid_by_port(port));
2733                 ZFCP_LOG_DEBUG("status qualifier:\n");
2734                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2735                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
2736                               sizeof (union fsf_status_qual));
2737                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2738                                  "fsf_s_phand_nv");
2739                 zfcp_erp_adapter_reopen(port->adapter, 0);
2740                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2741                 break;
2742
2743         case FSF_ADAPTER_STATUS_AVAILABLE:
2744                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2745                 /* Note: FSF has actually closed the port in this case.
2746                  * The status code is just daft. Fingers crossed for a change
2747                  */
2748                 retval = 0;
2749                 break;
2750
2751         case FSF_GOOD:
2752                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2753                 ZFCP_LOG_TRACE("remote port 0x016%Lx on adapter %s closed, "
2754                                "port handle 0x%x\n", port->wwpn,
2755                                zfcp_get_busid_by_port(port), port->handle);
2756                 zfcp_erp_modify_port_status(port,
2757                                             ZFCP_STATUS_COMMON_OPEN,
2758                                             ZFCP_CLEAR);
2759                 retval = 0;
2760                 break;
2761
2762         default:
2763                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2764                                 "(debug info 0x%x)\n",
2765                                 fsf_req->qtcb->header.fsf_status);
2766                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2767                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2768                                 &fsf_req->qtcb->header.fsf_status,
2769                                 sizeof (u32));
2770                 break;
2771         }
2772
2773  skip_fsfstatus:
2774         atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &port->status);
2775         return retval;
2776 }
2777
2778 /*
2779  * function:    zfcp_fsf_close_physical_port
2780  *
2781  * purpose:     submit FSF command "close physical port"
2782  *
2783  * returns:     address of initiated FSF request
2784  *              NULL - request could not be initiated
2785  */
2786 int
2787 zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action)
2788 {
2789         int retval = 0;
2790         unsigned long lock_flags;
2791         volatile struct qdio_buffer_element *sbale;
2792
2793         /* setup new FSF request */
2794         retval = zfcp_fsf_req_create(erp_action->adapter,
2795                                      FSF_QTCB_CLOSE_PHYSICAL_PORT,
2796                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
2797                                      erp_action->adapter->pool.fsf_req_erp,
2798                                      &lock_flags, &erp_action->fsf_req);
2799         if (retval < 0) {
2800                 ZFCP_LOG_INFO("error: Could not create close physical port "
2801                               "request (adapter %s, port 0x%016Lx)\n",
2802                               zfcp_get_busid_by_adapter(erp_action->adapter),
2803                               erp_action->port->wwpn);
2804
2805                 goto out;
2806         }
2807
2808         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
2809                                     erp_action->fsf_req->sbal_curr, 0);
2810         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
2811         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
2812
2813         /* mark port as being closed */
2814         atomic_set_mask(ZFCP_STATUS_PORT_PHYS_CLOSING,
2815                         &erp_action->port->status);
2816         /* save a pointer to this port */
2817         erp_action->fsf_req->data.close_physical_port.port = erp_action->port;
2818         /* port to be closeed */
2819         erp_action->fsf_req->qtcb->header.port_handle =
2820             erp_action->port->handle;
2821         erp_action->fsf_req->erp_action = erp_action;
2822
2823         /* start QDIO request for this FSF request */
2824         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
2825         if (retval) {
2826                 ZFCP_LOG_INFO("error: Could not send close physical port "
2827                               "request (adapter %s, port 0x%016Lx)\n",
2828                               zfcp_get_busid_by_adapter(erp_action->adapter),
2829                               erp_action->port->wwpn);
2830                 zfcp_fsf_req_free(erp_action->fsf_req);
2831                 erp_action->fsf_req = NULL;
2832                 goto out;
2833         }
2834
2835         ZFCP_LOG_TRACE("close physical port request initiated "
2836                        "(adapter %s, port 0x%016Lx)\n",
2837                        zfcp_get_busid_by_adapter(erp_action->adapter),
2838                        erp_action->port->wwpn);
2839  out:
2840         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
2841                                 lock_flags);
2842         return retval;
2843 }
2844
2845 /*
2846  * function:    zfcp_fsf_close_physical_port_handler
2847  *
2848  * purpose:     is called for finished Close Physical Port FSF command
2849  *
2850  * returns:
2851  */
2852 static int
2853 zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *fsf_req)
2854 {
2855         int retval = -EINVAL;
2856         struct zfcp_port *port;
2857         struct zfcp_unit *unit;
2858         struct fsf_qtcb_header *header;
2859         u16 subtable, rule, counter;
2860
2861         port = fsf_req->data.close_physical_port.port;
2862         header = &fsf_req->qtcb->header;
2863
2864         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
2865                 /* don't change port status in our bookkeeping */
2866                 goto skip_fsfstatus;
2867         }
2868
2869         /* evaluate FSF status in QTCB */
2870         switch (header->fsf_status) {
2871
2872         case FSF_PORT_HANDLE_NOT_VALID:
2873                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
2874                 ZFCP_LOG_INFO("Temporary port identifier 0x%x invalid"
2875                               "(adapter %s, port 0x%016Lx). "
2876                               "This may happen occasionally.\n",
2877                               port->handle,
2878                               zfcp_get_busid_by_port(port),
2879                               port->wwpn);
2880                 ZFCP_LOG_DEBUG("status qualifier:\n");
2881                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
2882                               (char *) &header->fsf_status_qual,
2883                               sizeof (union fsf_status_qual));
2884                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
2885                                  "fsf_s_phand_nv");
2886                 zfcp_erp_adapter_reopen(port->adapter, 0);
2887                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2888                 break;
2889
2890         case FSF_ACCESS_DENIED:
2891                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
2892                 ZFCP_LOG_NORMAL("Access denied, cannot close "
2893                                 "physical port 0x%016Lx on adapter %s\n",
2894                                 port->wwpn, zfcp_get_busid_by_port(port));
2895                 for (counter = 0; counter < 2; counter++) {
2896                         subtable = header->fsf_status_qual.halfword[counter * 2];
2897                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
2898                         switch (subtable) {
2899                         case FSF_SQ_CFDC_SUBTABLE_OS:
2900                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
2901                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
2902                         case FSF_SQ_CFDC_SUBTABLE_LUN:
2903                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
2904                                         zfcp_act_subtable_type[subtable], rule);
2905                                 break;
2906                         }
2907                 }
2908                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
2909                 zfcp_erp_port_access_denied(port);
2910                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2911                 break;
2912
2913         case FSF_PORT_BOXED:
2914                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
2915                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter "
2916                                "%s needs to be reopened but it was attempted "
2917                                "to close it physically.\n",
2918                                port->wwpn,
2919                                zfcp_get_busid_by_port(port));
2920                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_pboxed");
2921                 zfcp_erp_port_reopen(port, 0);
2922                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
2923                         ZFCP_STATUS_FSFREQ_RETRY;
2924                 break;
2925
2926         case FSF_ADAPTER_STATUS_AVAILABLE:
2927                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
2928                 switch (header->fsf_status_qual.word[0]) {
2929                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
2930                         ZFCP_LOG_FLAGS(2,
2931                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
2932                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2933                                          "fsf_sq_ltest");
2934                         /* This will now be escalated by ERP */
2935                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2936                         break;
2937                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
2938                         ZFCP_LOG_FLAGS(2,
2939                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
2940                         /* ERP strategy will escalate */
2941                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
2942                                          "fsf_sq_ulp");
2943                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
2944                         break;
2945                 default:
2946                         ZFCP_LOG_NORMAL
2947                             ("bug: Wrong status qualifier 0x%x arrived.\n",
2948                              header->fsf_status_qual.word[0]);
2949                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
2950                                          "fsf_sq_inval:");
2951                         debug_exception(
2952                                 fsf_req->adapter->erp_dbf, 0,
2953                                 &header->fsf_status_qual.word[0], sizeof (u32));
2954                         break;
2955                 }
2956                 break;
2957
2958         case FSF_GOOD:
2959                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
2960                 ZFCP_LOG_DEBUG("Remote port 0x%016Lx via adapter %s "
2961                                "physically closed, port handle 0x%x\n",
2962                                port->wwpn,
2963                                zfcp_get_busid_by_port(port), port->handle);
2964                 /* can't use generic zfcp_erp_modify_port_status because
2965                  * ZFCP_STATUS_COMMON_OPEN must not be reset for the port
2966                  */
2967                 atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_OPEN, &port->status);
2968                 list_for_each_entry(unit, &port->unit_list_head, list)
2969                     atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
2970                 retval = 0;
2971                 break;
2972
2973         default:
2974                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
2975                                 "(debug info 0x%x)\n",
2976                                 header->fsf_status);
2977                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
2978                 debug_exception(fsf_req->adapter->erp_dbf, 0,
2979                                 &header->fsf_status, sizeof (u32));
2980                 break;
2981         }
2982
2983  skip_fsfstatus:
2984         atomic_clear_mask(ZFCP_STATUS_PORT_PHYS_CLOSING, &port->status);
2985         return retval;
2986 }
2987
2988 /*
2989  * function:    zfcp_fsf_open_unit
2990  *
2991  * purpose:
2992  *
2993  * returns:
2994  *
2995  * assumptions: This routine does not check whether the associated
2996  *              remote port has already been opened. This should be
2997  *              done by calling routines. Otherwise some status
2998  *              may be presented by FSF
2999  */
3000 int
3001 zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action)
3002 {
3003         volatile struct qdio_buffer_element *sbale;
3004         unsigned long lock_flags;
3005         int retval = 0;
3006
3007         /* setup new FSF request */
3008         retval = zfcp_fsf_req_create(erp_action->adapter,
3009                                      FSF_QTCB_OPEN_LUN,
3010                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3011                                      erp_action->adapter->pool.fsf_req_erp,
3012                                      &lock_flags, &(erp_action->fsf_req));
3013         if (retval < 0) {
3014                 ZFCP_LOG_INFO("error: Could not create open unit request for "
3015                               "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3016                               erp_action->unit->fcp_lun,
3017                               erp_action->unit->port->wwpn,
3018                               zfcp_get_busid_by_adapter(erp_action->adapter));
3019                 goto out;
3020         }
3021
3022         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3023                                     erp_action->fsf_req->sbal_curr, 0);
3024         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3025         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3026
3027         erp_action->fsf_req->qtcb->header.port_handle =
3028                 erp_action->port->handle;
3029         erp_action->fsf_req->qtcb->bottom.support.fcp_lun =
3030                 erp_action->unit->fcp_lun;
3031         erp_action->fsf_req->qtcb->bottom.support.option =
3032                 FSF_OPEN_LUN_SUPPRESS_BOXING;
3033         atomic_set_mask(ZFCP_STATUS_COMMON_OPENING, &erp_action->unit->status);
3034         erp_action->fsf_req->data.open_unit.unit = erp_action->unit;
3035         erp_action->fsf_req->erp_action = erp_action;
3036
3037         /* start QDIO request for this FSF request */
3038         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3039         if (retval) {
3040                 ZFCP_LOG_INFO("error: Could not send an open unit request "
3041                               "on the adapter %s, port 0x%016Lx for "
3042                               "unit 0x%016Lx\n",
3043                               zfcp_get_busid_by_adapter(erp_action->adapter),
3044                               erp_action->port->wwpn,
3045                               erp_action->unit->fcp_lun);
3046                 zfcp_fsf_req_free(erp_action->fsf_req);
3047                 erp_action->fsf_req = NULL;
3048                 goto out;
3049         }
3050
3051         ZFCP_LOG_TRACE("Open LUN request initiated (adapter %s, "
3052                        "port 0x%016Lx, unit 0x%016Lx)\n",
3053                        zfcp_get_busid_by_adapter(erp_action->adapter),
3054                        erp_action->port->wwpn, erp_action->unit->fcp_lun);
3055  out:
3056         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3057                                 lock_flags);
3058         return retval;
3059 }
3060
3061 /*
3062  * function:    zfcp_fsf_open_unit_handler
3063  *
3064  * purpose:     is called for finished Open LUN command
3065  *
3066  * returns:
3067  */
3068 static int
3069 zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *fsf_req)
3070 {
3071         int retval = -EINVAL;
3072         struct zfcp_adapter *adapter;
3073         struct zfcp_unit *unit;
3074         struct fsf_qtcb_header *header;
3075         struct fsf_qtcb_bottom_support *bottom;
3076         struct fsf_queue_designator *queue_designator;
3077         u16 subtable, rule, counter;
3078         u32 allowed, exclusive, readwrite;
3079
3080         unit = fsf_req->data.open_unit.unit;
3081
3082         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3083                 /* don't change unit status in our bookkeeping */
3084                 goto skip_fsfstatus;
3085         }
3086
3087         adapter = fsf_req->adapter;
3088         header = &fsf_req->qtcb->header;
3089         bottom = &fsf_req->qtcb->bottom.support;
3090         queue_designator = &header->fsf_status_qual.fsf_queue_designator;
3091
3092         allowed   = bottom->lun_access_info & FSF_UNIT_ACCESS_OPEN_LUN_ALLOWED;
3093         exclusive = bottom->lun_access_info & FSF_UNIT_ACCESS_EXCLUSIVE;
3094         readwrite = bottom->lun_access_info & FSF_UNIT_ACCESS_OUTBOUND_TRANSFER;
3095
3096         atomic_clear_mask(ZFCP_STATUS_COMMON_ACCESS_DENIED |
3097                           ZFCP_STATUS_UNIT_SHARED |
3098                           ZFCP_STATUS_UNIT_READONLY,
3099                           &unit->status);
3100
3101         /* evaluate FSF status in QTCB */
3102         switch (header->fsf_status) {
3103
3104         case FSF_PORT_HANDLE_NOT_VALID:
3105                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3106                 ZFCP_LOG_INFO("Temporary port identifier 0x%x "
3107                               "for port 0x%016Lx on adapter %s invalid "
3108                               "This may happen occasionally\n",
3109                               unit->port->handle,
3110                               unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3111                 ZFCP_LOG_DEBUG("status qualifier:\n");
3112                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3113                               (char *) &header->fsf_status_qual,
3114                               sizeof (union fsf_status_qual));
3115                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_ph_nv");
3116                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3117                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3118                 break;
3119
3120         case FSF_LUN_ALREADY_OPEN:
3121                 ZFCP_LOG_FLAGS(0, "FSF_LUN_ALREADY_OPEN\n");
3122                 ZFCP_LOG_NORMAL("bug: Attempted to open unit 0x%016Lx on "
3123                                 "remote port 0x%016Lx on adapter %s twice.\n",
3124                                 unit->fcp_lun,
3125                                 unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3126                 debug_text_exception(adapter->erp_dbf, 0,
3127                                      "fsf_s_uopen");
3128                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3129                 break;
3130
3131         case FSF_ACCESS_DENIED:
3132                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3133                 ZFCP_LOG_NORMAL("Access denied, cannot open unit 0x%016Lx on "
3134                                 "remote port 0x%016Lx on adapter %s\n",
3135                                 unit->fcp_lun, unit->port->wwpn,
3136                                 zfcp_get_busid_by_unit(unit));
3137                 for (counter = 0; counter < 2; counter++) {
3138                         subtable = header->fsf_status_qual.halfword[counter * 2];
3139                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3140                         switch (subtable) {
3141                         case FSF_SQ_CFDC_SUBTABLE_OS:
3142                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3143                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3144                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3145                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3146                                         zfcp_act_subtable_type[subtable], rule);
3147                                 break;
3148                         }
3149                 }
3150                 debug_text_event(adapter->erp_dbf, 1, "fsf_s_access");
3151                 zfcp_erp_unit_access_denied(unit);
3152                 atomic_clear_mask(ZFCP_STATUS_UNIT_SHARED, &unit->status);
3153                 atomic_clear_mask(ZFCP_STATUS_UNIT_READONLY, &unit->status);
3154                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3155                 break;
3156
3157         case FSF_PORT_BOXED:
3158                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3159                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3160                                "needs to be reopened\n",
3161                                unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3162                 debug_text_event(adapter->erp_dbf, 2, "fsf_s_pboxed");
3163                 zfcp_erp_port_reopen(unit->port, 0);
3164                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3165                         ZFCP_STATUS_FSFREQ_RETRY;
3166                 break;
3167
3168         case FSF_LUN_SHARING_VIOLATION:
3169                 ZFCP_LOG_FLAGS(2, "FSF_LUN_SHARING_VIOLATION\n");
3170                 if (header->fsf_status_qual.word[0] != 0) {
3171                         ZFCP_LOG_NORMAL("FCP-LUN 0x%Lx at the remote port "
3172                                         "with WWPN 0x%Lx "
3173                                         "connected to the adapter %s "
3174                                         "is already in use in LPAR%d, CSS%d\n",
3175                                         unit->fcp_lun,
3176                                         unit->port->wwpn,
3177                                         zfcp_get_busid_by_unit(unit),
3178                                         queue_designator->hla,
3179                                         queue_designator->cssid);
3180                 } else {
3181                         subtable = header->fsf_status_qual.halfword[4];
3182                         rule = header->fsf_status_qual.halfword[5];
3183                         switch (subtable) {
3184                         case FSF_SQ_CFDC_SUBTABLE_OS:
3185                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3186                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3187                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3188                                 ZFCP_LOG_NORMAL("Access to FCP-LUN 0x%Lx at the "
3189                                                 "remote port with WWPN 0x%Lx "
3190                                                 "connected to the adapter %s "
3191                                                 "is denied (%s rule %d)\n",
3192                                                 unit->fcp_lun,
3193                                                 unit->port->wwpn,
3194                                                 zfcp_get_busid_by_unit(unit),
3195                                                 zfcp_act_subtable_type[subtable],
3196                                                 rule);
3197                                 break;
3198                         }
3199                 }
3200                 ZFCP_LOG_DEBUG("status qualifier:\n");
3201                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3202                               (char *) &header->fsf_status_qual,
3203                               sizeof (union fsf_status_qual));
3204                 debug_text_event(adapter->erp_dbf, 2,
3205                                  "fsf_s_l_sh_vio");
3206                 zfcp_erp_unit_failed(unit);
3207                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3208                 break;
3209
3210         case FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED:
3211                 ZFCP_LOG_FLAGS(1, "FSF_MAXIMUM_NUMBER_OF_LUNS_EXCEEDED\n");
3212                 ZFCP_LOG_INFO("error: The adapter ran out of resources. "
3213                               "There is no handle (temporary port identifier) "
3214                               "available for unit 0x%016Lx on port 0x%016Lx "
3215                               "on adapter %s\n",
3216                               unit->fcp_lun,
3217                               unit->port->wwpn,
3218                               zfcp_get_busid_by_unit(unit));
3219                 debug_text_event(adapter->erp_dbf, 1,
3220                                  "fsf_s_max_units");
3221                 zfcp_erp_unit_failed(unit);
3222                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3223                 break;
3224
3225         case FSF_ADAPTER_STATUS_AVAILABLE:
3226                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3227                 switch (header->fsf_status_qual.word[0]) {
3228                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3229                         ZFCP_LOG_FLAGS(2,
3230                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3231                         /* Re-establish link to port */
3232                         debug_text_event(adapter->erp_dbf, 1,
3233                                          "fsf_sq_ltest");
3234                         zfcp_erp_port_reopen(unit->port, 0);
3235                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3236                         break;
3237                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3238                         ZFCP_LOG_FLAGS(2,
3239                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3240                         /* ERP strategy will escalate */
3241                         debug_text_event(adapter->erp_dbf, 1,
3242                                          "fsf_sq_ulp");
3243                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3244                         break;
3245                 default:
3246                         ZFCP_LOG_NORMAL
3247                             ("bug: Wrong status qualifier 0x%x arrived.\n",
3248                              header->fsf_status_qual.word[0]);
3249                         debug_text_event(adapter->erp_dbf, 0,
3250                                          "fsf_sq_inval:");
3251                         debug_exception(adapter->erp_dbf, 0,
3252                                         &header->fsf_status_qual.word[0],
3253                                 sizeof (u32));
3254                 }
3255                 break;
3256
3257         case FSF_INVALID_COMMAND_OPTION:
3258                 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
3259                 ZFCP_LOG_NORMAL(
3260                         "Invalid option 0x%x has been specified "
3261                         "in QTCB bottom sent to the adapter %s\n",
3262                         bottom->option,
3263                         zfcp_get_busid_by_adapter(adapter));
3264                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3265                 retval = -EINVAL;
3266                 break;
3267
3268         case FSF_GOOD:
3269                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3270                 /* save LUN handle assigned by FSF */
3271                 unit->handle = header->lun_handle;
3272                 ZFCP_LOG_TRACE("unit 0x%016Lx on remote port 0x%016Lx on "
3273                                "adapter %s opened, port handle 0x%x\n",
3274                                unit->fcp_lun,
3275                                unit->port->wwpn,
3276                                zfcp_get_busid_by_unit(unit),
3277                                unit->handle);
3278                 /* mark unit as open */
3279                 atomic_set_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3280
3281                 if (adapter->supported_features & FSF_FEATURE_LUN_SHARING){
3282                         if (!exclusive)
3283                                 atomic_set_mask(ZFCP_STATUS_UNIT_SHARED,
3284                                                 &unit->status);
3285
3286                         if (!readwrite) {
3287                                 atomic_set_mask(ZFCP_STATUS_UNIT_READONLY,
3288                                                 &unit->status);
3289                                 ZFCP_LOG_NORMAL("read-only access for unit "
3290                                                 "(adapter %s, wwpn=0x%016Lx, "
3291                                                 "fcp_lun=0x%016Lx)\n",
3292                                                 zfcp_get_busid_by_unit(unit),
3293                                                 unit->port->wwpn,
3294                                                 unit->fcp_lun);
3295                         }
3296
3297                         if (exclusive && !readwrite) {
3298                                 ZFCP_LOG_NORMAL("exclusive access of read-only "
3299                                                 "unit not supported\n");
3300                                 zfcp_erp_unit_failed(unit);
3301                                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3302                                 zfcp_erp_unit_shutdown(unit, 0);
3303                         } else if (!exclusive && readwrite) {
3304                                 ZFCP_LOG_NORMAL("shared access of read-write "
3305                                                 "unit not supported\n");
3306                                 zfcp_erp_unit_failed(unit);
3307                                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3308                                 zfcp_erp_unit_shutdown(unit, 0);
3309                         }
3310                 }
3311
3312                 retval = 0;
3313                 break;
3314
3315         default:
3316                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3317                                 "(debug info 0x%x)\n",
3318                                 header->fsf_status);
3319                 debug_text_event(adapter->erp_dbf, 0, "fsf_s_inval:");
3320                 debug_exception(adapter->erp_dbf, 0,
3321                                 &header->fsf_status, sizeof (u32));
3322                 break;
3323         }
3324
3325  skip_fsfstatus:
3326         atomic_clear_mask(ZFCP_STATUS_COMMON_OPENING, &unit->status);
3327         return retval;
3328 }
3329
3330 /*
3331  * function:    zfcp_fsf_close_unit
3332  *
3333  * purpose:
3334  *
3335  * returns:     address of fsf_req - request successfully initiated
3336  *              NULL -
3337  *
3338  * assumptions: This routine does not check whether the associated
3339  *              remote port/lun has already been opened. This should be
3340  *              done by calling routines. Otherwise some status
3341  *              may be presented by FSF
3342  */
3343 int
3344 zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action)
3345 {
3346         volatile struct qdio_buffer_element *sbale;
3347         unsigned long lock_flags;
3348         int retval = 0;
3349
3350         /* setup new FSF request */
3351         retval = zfcp_fsf_req_create(erp_action->adapter,
3352                                      FSF_QTCB_CLOSE_LUN,
3353                                      ZFCP_WAIT_FOR_SBAL | ZFCP_REQ_AUTO_CLEANUP,
3354                                      erp_action->adapter->pool.fsf_req_erp,
3355                                      &lock_flags, &(erp_action->fsf_req));
3356         if (retval < 0) {
3357                 ZFCP_LOG_INFO("error: Could not create close unit request for "
3358                               "unit 0x%016Lx on port 0x%016Lx on adapter %s.\n",
3359                               erp_action->unit->fcp_lun,
3360                               erp_action->port->wwpn,
3361                               zfcp_get_busid_by_adapter(erp_action->adapter));
3362                 goto out;
3363         }
3364
3365         sbale = zfcp_qdio_sbale_req(erp_action->fsf_req,
3366                                     erp_action->fsf_req->sbal_curr, 0);
3367         sbale[0].flags |= SBAL_FLAGS0_TYPE_READ;
3368         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3369
3370         erp_action->fsf_req->qtcb->header.port_handle =
3371             erp_action->port->handle;
3372         erp_action->fsf_req->qtcb->header.lun_handle = erp_action->unit->handle;
3373         atomic_set_mask(ZFCP_STATUS_COMMON_CLOSING, &erp_action->unit->status);
3374         erp_action->fsf_req->data.close_unit.unit = erp_action->unit;
3375         erp_action->fsf_req->erp_action = erp_action;
3376
3377         /* start QDIO request for this FSF request */
3378         retval = zfcp_fsf_req_send(erp_action->fsf_req, &erp_action->timer);
3379         if (retval) {
3380                 ZFCP_LOG_INFO("error: Could not send a close unit request for "
3381                               "unit 0x%016Lx on port 0x%016Lx onadapter %s.\n",
3382                               erp_action->unit->fcp_lun,
3383                               erp_action->port->wwpn,
3384                               zfcp_get_busid_by_adapter(erp_action->adapter));
3385                 zfcp_fsf_req_free(erp_action->fsf_req);
3386                 erp_action->fsf_req = NULL;
3387                 goto out;
3388         }
3389
3390         ZFCP_LOG_TRACE("Close LUN request initiated (adapter %s, "
3391                        "port 0x%016Lx, unit 0x%016Lx)\n",
3392                        zfcp_get_busid_by_adapter(erp_action->adapter),
3393                        erp_action->port->wwpn, erp_action->unit->fcp_lun);
3394  out:
3395         write_unlock_irqrestore(&erp_action->adapter->request_queue.queue_lock,
3396                                 lock_flags);
3397         return retval;
3398 }
3399
3400 /*
3401  * function:    zfcp_fsf_close_unit_handler
3402  *
3403  * purpose:     is called for finished Close LUN FSF command
3404  *
3405  * returns:
3406  */
3407 static int
3408 zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *fsf_req)
3409 {
3410         int retval = -EINVAL;
3411         struct zfcp_unit *unit;
3412
3413         unit = fsf_req->data.close_unit.unit;   /* restore unit */
3414
3415         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
3416                 /* don't change unit status in our bookkeeping */
3417                 goto skip_fsfstatus;
3418         }
3419
3420         /* evaluate FSF status in QTCB */
3421         switch (fsf_req->qtcb->header.fsf_status) {
3422
3423         case FSF_PORT_HANDLE_NOT_VALID:
3424                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3425                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3426                               "0x%016Lx on adapter %s invalid. This may "
3427                               "happen in rare circumstances\n",
3428                               unit->port->handle,
3429                               unit->port->wwpn,
3430                               zfcp_get_busid_by_unit(unit));
3431                 ZFCP_LOG_DEBUG("status qualifier:\n");
3432                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3433                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
3434                               sizeof (union fsf_status_qual));
3435                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3436                                  "fsf_s_phand_nv");
3437                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3438                 zfcp_cmd_dbf_event_fsf("porthinv", fsf_req,
3439                                        &fsf_req->qtcb->header.fsf_status_qual,
3440                                        sizeof (union fsf_status_qual));
3441                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3442                 break;
3443
3444         case FSF_LUN_HANDLE_NOT_VALID:
3445                 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3446                 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x of unit "
3447                               "0x%016Lx on port 0x%016Lx on adapter %s is "
3448                               "invalid. This may happen occasionally.\n",
3449                               unit->handle,
3450                               unit->fcp_lun,
3451                               unit->port->wwpn,
3452                               zfcp_get_busid_by_unit(unit));
3453                 ZFCP_LOG_DEBUG("Status qualifier data:\n");
3454                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3455                               (char *) &fsf_req->qtcb->header.fsf_status_qual,
3456                               sizeof (union fsf_status_qual));
3457                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3458                                  "fsf_s_lhand_nv");
3459                 zfcp_erp_port_reopen(unit->port, 0);
3460                 zfcp_cmd_dbf_event_fsf("lunhinv", fsf_req,
3461                                        &fsf_req->qtcb->header.fsf_status_qual,
3462                                        sizeof (union fsf_status_qual));
3463                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3464                 break;
3465
3466         case FSF_PORT_BOXED:
3467                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
3468                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
3469                                "needs to be reopened\n",
3470                                unit->port->wwpn,
3471                                zfcp_get_busid_by_unit(unit));
3472                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
3473                 zfcp_erp_port_reopen(unit->port, 0);
3474                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
3475                         ZFCP_STATUS_FSFREQ_RETRY;
3476                 break;
3477
3478         case FSF_ADAPTER_STATUS_AVAILABLE:
3479                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
3480                 switch (fsf_req->qtcb->header.fsf_status_qual.word[0]) {
3481                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
3482                         ZFCP_LOG_FLAGS(2,
3483                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
3484                         /* re-establish link to port */
3485                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
3486                                          "fsf_sq_ltest");
3487                         zfcp_erp_port_reopen(unit->port, 0);
3488                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3489                         break;
3490                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
3491                         ZFCP_LOG_FLAGS(2,
3492                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
3493                         /* ERP strategy will escalate */
3494                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
3495                                          "fsf_sq_ulp");
3496                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3497                         break;
3498                 default:
3499                         ZFCP_LOG_NORMAL
3500                             ("bug: Wrong status qualifier 0x%x arrived.\n",
3501                              fsf_req->qtcb->header.fsf_status_qual.word[0]);
3502                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
3503                                          "fsf_sq_inval:");
3504                         debug_exception(
3505                                 fsf_req->adapter->erp_dbf, 0,
3506                                 &fsf_req->qtcb->header.fsf_status_qual.word[0],
3507                                 sizeof (u32));
3508                         break;
3509                 }
3510                 break;
3511
3512         case FSF_GOOD:
3513                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
3514                 ZFCP_LOG_TRACE("unit 0x%016Lx on port 0x%016Lx on adapter %s "
3515                                "closed, port handle 0x%x\n",
3516                                unit->fcp_lun,
3517                                unit->port->wwpn,
3518                                zfcp_get_busid_by_unit(unit),
3519                                unit->handle);
3520                 /* mark unit as closed */
3521                 atomic_clear_mask(ZFCP_STATUS_COMMON_OPEN, &unit->status);
3522                 retval = 0;
3523                 break;
3524
3525         default:
3526                 ZFCP_LOG_NORMAL("bug: An unknown FSF Status was presented "
3527                                 "(debug info 0x%x)\n",
3528                                 fsf_req->qtcb->header.fsf_status);
3529                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
3530                 debug_exception(fsf_req->adapter->erp_dbf, 0,
3531                                 &fsf_req->qtcb->header.fsf_status,
3532                                 sizeof (u32));
3533                 break;
3534         }
3535
3536  skip_fsfstatus:
3537         atomic_clear_mask(ZFCP_STATUS_COMMON_CLOSING, &unit->status);
3538         return retval;
3539 }
3540
3541 /**
3542  * zfcp_fsf_send_fcp_command_task - initiate an FCP command (for a SCSI command)
3543  * @adapter: adapter where scsi command is issued
3544  * @unit: unit where command is sent to
3545  * @scsi_cmnd: scsi command to be sent
3546  * @timer: timer to be started when request is initiated
3547  * @req_flags: flags for fsf_request
3548  */
3549 int
3550 zfcp_fsf_send_fcp_command_task(struct zfcp_adapter *adapter,
3551                                struct zfcp_unit *unit,
3552                                struct scsi_cmnd * scsi_cmnd,
3553                                struct timer_list *timer, int req_flags)
3554 {
3555         struct zfcp_fsf_req *fsf_req = NULL;
3556         struct fcp_cmnd_iu *fcp_cmnd_iu;
3557         unsigned int sbtype;
3558         unsigned long lock_flags;
3559         int real_bytes = 0;
3560         int retval = 0;
3561         int mask;
3562
3563         /* setup new FSF request */
3564         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3565                                      adapter->pool.fsf_req_scsi,
3566                                      &lock_flags, &fsf_req);
3567         if (unlikely(retval < 0)) {
3568                 ZFCP_LOG_DEBUG("error: Could not create FCP command request "
3569                                "for unit 0x%016Lx on port 0x%016Lx on "
3570                                "adapter %s\n",
3571                                unit->fcp_lun,
3572                                unit->port->wwpn,
3573                                zfcp_get_busid_by_adapter(adapter));
3574                 goto failed_req_create;
3575         }
3576
3577         /*
3578          * associate FSF request with SCSI request
3579          * (need this for look up on abort)
3580          */
3581         fsf_req->data.send_fcp_command_task.fsf_req = fsf_req;
3582         scsi_cmnd->host_scribble = (char *) &(fsf_req->data);
3583
3584         /*
3585          * associate SCSI command with FSF request
3586          * (need this for look up on normal command completion)
3587          */
3588         fsf_req->data.send_fcp_command_task.scsi_cmnd = scsi_cmnd;
3589         fsf_req->data.send_fcp_command_task.start_jiffies = jiffies;
3590         fsf_req->data.send_fcp_command_task.unit = unit;
3591         ZFCP_LOG_DEBUG("unit=%p, fcp_lun=0x%016Lx\n", unit, unit->fcp_lun);
3592
3593         /* set handles of unit and its parent port in QTCB */
3594         fsf_req->qtcb->header.lun_handle = unit->handle;
3595         fsf_req->qtcb->header.port_handle = unit->port->handle;
3596
3597         /* FSF does not define the structure of the FCP_CMND IU */
3598         fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3599             &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3600
3601         /*
3602          * set depending on data direction:
3603          *      data direction bits in SBALE (SB Type)
3604          *      data direction bits in QTCB
3605          *      data direction bits in FCP_CMND IU
3606          */
3607         switch (scsi_cmnd->sc_data_direction) {
3608         case DMA_NONE:
3609                 ZFCP_LOG_FLAGS(3, "DMA_NONE\n");
3610                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3611                 /*
3612                  * FIXME(qdio):
3613                  * what is the correct type for commands
3614                  * without 'real' data buffers?
3615                  */
3616                 sbtype = SBAL_FLAGS0_TYPE_READ;
3617                 break;
3618         case DMA_FROM_DEVICE:
3619                 ZFCP_LOG_FLAGS(3, "DMA_FROM_DEVICE\n");
3620                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_READ;
3621                 sbtype = SBAL_FLAGS0_TYPE_READ;
3622                 fcp_cmnd_iu->rddata = 1;
3623                 break;
3624         case DMA_TO_DEVICE:
3625                 ZFCP_LOG_FLAGS(3, "DMA_TO_DEVICE\n");
3626                 fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE;
3627                 sbtype = SBAL_FLAGS0_TYPE_WRITE;
3628                 fcp_cmnd_iu->wddata = 1;
3629                 break;
3630         case DMA_BIDIRECTIONAL:
3631                 ZFCP_LOG_FLAGS(0, "DMA_BIDIRECTIONAL not supported\n");
3632         default:
3633                 /*
3634                  * dummy, catch this condition earlier
3635                  * in zfcp_scsi_queuecommand
3636                  */
3637                 goto failed_scsi_cmnd;
3638         }
3639
3640         /* set FC service class in QTCB (3 per default) */
3641         fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3642
3643         /* set FCP_LUN in FCP_CMND IU in QTCB */
3644         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3645
3646         mask = ZFCP_STATUS_UNIT_READONLY | ZFCP_STATUS_UNIT_SHARED;
3647
3648         /* set task attributes in FCP_CMND IU in QTCB */
3649         if (likely((scsi_cmnd->device->simple_tags) ||
3650                    (atomic_test_mask(mask, &unit->status))))
3651                 fcp_cmnd_iu->task_attribute = SIMPLE_Q;
3652         else
3653                 fcp_cmnd_iu->task_attribute = UNTAGGED;
3654
3655         /* set additional length of FCP_CDB in FCP_CMND IU in QTCB, if needed */
3656         if (unlikely(scsi_cmnd->cmd_len > FCP_CDB_LENGTH)) {
3657                 fcp_cmnd_iu->add_fcp_cdb_length
3658                     = (scsi_cmnd->cmd_len - FCP_CDB_LENGTH) >> 2;
3659                 ZFCP_LOG_TRACE("SCSI CDB length is 0x%x, "
3660                                "additional FCP_CDB length is 0x%x "
3661                                "(shifted right 2 bits)\n",
3662                                scsi_cmnd->cmd_len,
3663                                fcp_cmnd_iu->add_fcp_cdb_length);
3664         }
3665         /*
3666          * copy SCSI CDB (including additional length, if any) to
3667          * FCP_CDB in FCP_CMND IU in QTCB
3668          */
3669         memcpy(fcp_cmnd_iu->fcp_cdb, scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3670
3671         /* FCP CMND IU length in QTCB */
3672         fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3673                 sizeof (struct fcp_cmnd_iu) +
3674                 fcp_cmnd_iu->add_fcp_cdb_length + sizeof (fcp_dl_t);
3675
3676         /* generate SBALEs from data buffer */
3677         real_bytes = zfcp_qdio_sbals_from_scsicmnd(fsf_req, sbtype, scsi_cmnd);
3678         if (unlikely(real_bytes < 0)) {
3679                 if (fsf_req->sbal_number < ZFCP_MAX_SBALS_PER_REQ) {
3680                         ZFCP_LOG_DEBUG(
3681                                 "Data did not fit into available buffer(s), "
3682                                "waiting for more...\n");
3683                 retval = -EIO;
3684         } else {
3685                 ZFCP_LOG_NORMAL("error: No truncation implemented but "
3686                                 "required. Shutting down unit "
3687                                 "(adapter %s, port 0x%016Lx, "
3688                                 "unit 0x%016Lx)\n",
3689                                 zfcp_get_busid_by_unit(unit),
3690                                 unit->port->wwpn,
3691                                 unit->fcp_lun);
3692                 zfcp_erp_unit_shutdown(unit, 0);
3693                 retval = -EINVAL;
3694                 }
3695                 goto no_fit;
3696         }
3697
3698         /* set length of FCP data length in FCP_CMND IU in QTCB */
3699         zfcp_set_fcp_dl(fcp_cmnd_iu, real_bytes);
3700
3701         ZFCP_LOG_DEBUG("Sending SCSI command:\n");
3702         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3703                       (char *) scsi_cmnd->cmnd, scsi_cmnd->cmd_len);
3704
3705         /*
3706          * start QDIO request for this FSF request
3707          *  covered by an SBALE)
3708          */
3709         retval = zfcp_fsf_req_send(fsf_req, timer);
3710         if (unlikely(retval < 0)) {
3711                 ZFCP_LOG_INFO("error: Could not send FCP command request "
3712                               "on adapter %s, port 0x%016Lx, unit 0x%016Lx\n",
3713                               zfcp_get_busid_by_adapter(adapter),
3714                               unit->port->wwpn,
3715                               unit->fcp_lun);
3716                 goto send_failed;
3717         }
3718
3719         ZFCP_LOG_TRACE("Send FCP Command initiated (adapter %s, "
3720                        "port 0x%016Lx, unit 0x%016Lx)\n",
3721                        zfcp_get_busid_by_adapter(adapter),
3722                        unit->port->wwpn,
3723                        unit->fcp_lun);
3724         goto success;
3725
3726  send_failed:
3727  no_fit:
3728  failed_scsi_cmnd:
3729         zfcp_fsf_req_free(fsf_req);
3730         fsf_req = NULL;
3731         scsi_cmnd->host_scribble = NULL;
3732  success:
3733  failed_req_create:
3734         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3735         return retval;
3736 }
3737
3738 /*
3739  * function:    zfcp_fsf_send_fcp_command_task_management
3740  *
3741  * purpose:
3742  *
3743  * returns:
3744  *
3745  * FIXME(design): should be watched by a timeout!!!
3746  * FIXME(design) shouldn't this be modified to return an int
3747  *               also...don't know how though
3748  *
3749  */
3750 struct zfcp_fsf_req *
3751 zfcp_fsf_send_fcp_command_task_management(struct zfcp_adapter *adapter,
3752                                           struct zfcp_unit *unit,
3753                                           u8 tm_flags, int req_flags)
3754 {
3755         struct zfcp_fsf_req *fsf_req = NULL;
3756         int retval = 0;
3757         struct fcp_cmnd_iu *fcp_cmnd_iu;
3758         unsigned long lock_flags;
3759         volatile struct qdio_buffer_element *sbale;
3760
3761         /* setup new FSF request */
3762         retval = zfcp_fsf_req_create(adapter, FSF_QTCB_FCP_CMND, req_flags,
3763                                      adapter->pool.fsf_req_scsi,
3764                                      &lock_flags, &fsf_req);
3765         if (retval < 0) {
3766                 ZFCP_LOG_INFO("error: Could not create FCP command (task "
3767                               "management) request for adapter %s, port "
3768                               " 0x%016Lx, unit 0x%016Lx.\n",
3769                               zfcp_get_busid_by_adapter(adapter),
3770                               unit->port->wwpn, unit->fcp_lun);
3771                 goto out;
3772         }
3773
3774         /*
3775          * Used to decide on proper handler in the return path,
3776          * could be either zfcp_fsf_send_fcp_command_task_handler or
3777          * zfcp_fsf_send_fcp_command_task_management_handler */
3778
3779         fsf_req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
3780
3781         /*
3782          * hold a pointer to the unit being target of this
3783          * task management request
3784          */
3785         fsf_req->data.send_fcp_command_task_management.unit = unit;
3786
3787         /* set FSF related fields in QTCB */
3788         fsf_req->qtcb->header.lun_handle = unit->handle;
3789         fsf_req->qtcb->header.port_handle = unit->port->handle;
3790         fsf_req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;
3791         fsf_req->qtcb->bottom.io.service_class = adapter->fc_service_class;
3792         fsf_req->qtcb->bottom.io.fcp_cmnd_length =
3793                 sizeof (struct fcp_cmnd_iu) + sizeof (fcp_dl_t);
3794
3795         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
3796         sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE;
3797         sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
3798
3799         /* set FCP related fields in FCP_CMND IU in QTCB */
3800         fcp_cmnd_iu = (struct fcp_cmnd_iu *)
3801                 &(fsf_req->qtcb->bottom.io.fcp_cmnd);
3802         fcp_cmnd_iu->fcp_lun = unit->fcp_lun;
3803         fcp_cmnd_iu->task_management_flags = tm_flags;
3804
3805         /* start QDIO request for this FSF request */
3806         zfcp_fsf_start_scsi_er_timer(adapter);
3807         retval = zfcp_fsf_req_send(fsf_req, NULL);
3808         if (retval) {
3809                 del_timer(&adapter->scsi_er_timer);
3810                 ZFCP_LOG_INFO("error: Could not send an FCP-command (task "
3811                               "management) on adapter %s, port 0x%016Lx for "
3812                               "unit LUN 0x%016Lx\n",
3813                               zfcp_get_busid_by_adapter(adapter),
3814                               unit->port->wwpn,
3815                               unit->fcp_lun);
3816                 zfcp_fsf_req_free(fsf_req);
3817                 fsf_req = NULL;
3818                 goto out;
3819         }
3820
3821         ZFCP_LOG_TRACE("Send FCP Command (task management function) initiated "
3822                        "(adapter %s, port 0x%016Lx, unit 0x%016Lx, "
3823                        "tm_flags=0x%x)\n",
3824                        zfcp_get_busid_by_adapter(adapter),
3825                        unit->port->wwpn,
3826                        unit->fcp_lun,
3827                        tm_flags);
3828  out:
3829         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
3830         return fsf_req;
3831 }
3832
3833 /*
3834  * function:    zfcp_fsf_send_fcp_command_handler
3835  *
3836  * purpose:     is called for finished Send FCP Command
3837  *
3838  * returns:
3839  */
3840 static int
3841 zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *fsf_req)
3842 {
3843         int retval = -EINVAL;
3844         struct zfcp_unit *unit;
3845         struct fsf_qtcb_header *header;
3846         u16 subtable, rule, counter;
3847
3848         header = &fsf_req->qtcb->header;
3849
3850         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT))
3851                 unit = fsf_req->data.send_fcp_command_task_management.unit;
3852         else
3853                 unit = fsf_req->data.send_fcp_command_task.unit;
3854
3855         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
3856                 /* go directly to calls of special handlers */
3857                 goto skip_fsfstatus;
3858         }
3859
3860         /* evaluate FSF status in QTCB */
3861         switch (header->fsf_status) {
3862
3863         case FSF_PORT_HANDLE_NOT_VALID:
3864                 ZFCP_LOG_FLAGS(1, "FSF_PORT_HANDLE_NOT_VALID\n");
3865                 ZFCP_LOG_INFO("Temporary port identifier 0x%x for port "
3866                               "0x%016Lx on adapter %s invalid\n",
3867                               unit->port->handle,
3868                               unit->port->wwpn, zfcp_get_busid_by_unit(unit));
3869                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3870                               (char *) &header->fsf_status_qual,
3871                               sizeof (union fsf_status_qual));
3872                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3873                                  "fsf_s_phand_nv");
3874                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3875                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3876                 break;
3877
3878         case FSF_LUN_HANDLE_NOT_VALID:
3879                 ZFCP_LOG_FLAGS(1, "FSF_LUN_HANDLE_NOT_VALID\n");
3880                 ZFCP_LOG_INFO("Temporary LUN identifier 0x%x for unit "
3881                               "0x%016Lx on port 0x%016Lx on adapter %s is "
3882                               "invalid. This may happen occasionally.\n",
3883                               unit->handle,
3884                               unit->fcp_lun,
3885                               unit->port->wwpn,
3886                               zfcp_get_busid_by_unit(unit));
3887                 ZFCP_LOG_NORMAL("Status qualifier data:\n");
3888                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3889                               (char *) &header->fsf_status_qual,
3890                               sizeof (union fsf_status_qual));
3891                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3892                                  "fsf_s_uhand_nv");
3893                 zfcp_erp_port_reopen(unit->port, 0);
3894                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3895                 break;
3896
3897         case FSF_HANDLE_MISMATCH:
3898                 ZFCP_LOG_FLAGS(0, "FSF_HANDLE_MISMATCH\n");
3899                 ZFCP_LOG_NORMAL("bug: The port handle 0x%x has changed "
3900                                 "unexpectedly. (adapter %s, port 0x%016Lx, "
3901                                 "unit 0x%016Lx)\n",
3902                                 unit->port->handle,
3903                                 zfcp_get_busid_by_unit(unit),
3904                                 unit->port->wwpn,
3905                                 unit->fcp_lun);
3906                 ZFCP_LOG_NORMAL("status qualifier:\n");
3907                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_NORMAL,
3908                               (char *) &header->fsf_status_qual,
3909                               sizeof (union fsf_status_qual));
3910                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3911                                  "fsf_s_hand_mis");
3912                 zfcp_erp_adapter_reopen(unit->port->adapter, 0);
3913                 zfcp_cmd_dbf_event_fsf("handmism",
3914                                        fsf_req,
3915                                        &header->fsf_status_qual,
3916                                        sizeof (union fsf_status_qual));
3917                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3918                 break;
3919
3920         case FSF_SERVICE_CLASS_NOT_SUPPORTED:
3921                 ZFCP_LOG_FLAGS(0, "FSF_SERVICE_CLASS_NOT_SUPPORTED\n");
3922                 if (fsf_req->adapter->fc_service_class <= 3) {
3923                         ZFCP_LOG_NORMAL("error: The adapter %s does "
3924                                         "not support fibrechannel class %d.\n",
3925                                         zfcp_get_busid_by_unit(unit),
3926                                         fsf_req->adapter->fc_service_class);
3927                 } else {
3928                         ZFCP_LOG_NORMAL("bug: The fibrechannel class at "
3929                                         "adapter %s is invalid. "
3930                                         "(debug info %d)\n",
3931                                         zfcp_get_busid_by_unit(unit),
3932                                         fsf_req->adapter->fc_service_class);
3933                 }
3934                 /* stop operation for this adapter */
3935                 debug_text_exception(fsf_req->adapter->erp_dbf, 0,
3936                                      "fsf_s_class_nsup");
3937                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
3938                 zfcp_cmd_dbf_event_fsf("unsclass",
3939                                        fsf_req,
3940                                        &header->fsf_status_qual,
3941                                        sizeof (union fsf_status_qual));
3942                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3943                 break;
3944
3945         case FSF_FCPLUN_NOT_VALID:
3946                 ZFCP_LOG_FLAGS(0, "FSF_FCPLUN_NOT_VALID\n");
3947                 ZFCP_LOG_NORMAL("bug: unit 0x%016Lx on port 0x%016Lx on "
3948                                 "adapter %s does not have correct unit "
3949                                 "handle 0x%x\n",
3950                                 unit->fcp_lun,
3951                                 unit->port->wwpn,
3952                                 zfcp_get_busid_by_unit(unit),
3953                                 unit->handle);
3954                 ZFCP_LOG_DEBUG("status qualifier:\n");
3955                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
3956                               (char *) &header->fsf_status_qual,
3957                               sizeof (union fsf_status_qual));
3958                 debug_text_event(fsf_req->adapter->erp_dbf, 1,
3959                                  "fsf_s_fcp_lun_nv");
3960                 zfcp_erp_port_reopen(unit->port, 0);
3961                 zfcp_cmd_dbf_event_fsf("fluninv",
3962                                        fsf_req,
3963                                        &header->fsf_status_qual,
3964                                        sizeof (union fsf_status_qual));
3965                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3966                 break;
3967
3968         case FSF_ACCESS_DENIED:
3969                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_DENIED\n");
3970                 ZFCP_LOG_NORMAL("Access denied, cannot send FCP command to "
3971                                 "unit 0x%016Lx on port 0x%016Lx on "
3972                                 "adapter %s\n", unit->fcp_lun, unit->port->wwpn,
3973                                 zfcp_get_busid_by_unit(unit));
3974                 for (counter = 0; counter < 2; counter++) {
3975                         subtable = header->fsf_status_qual.halfword[counter * 2];
3976                         rule = header->fsf_status_qual.halfword[counter * 2 + 1];
3977                         switch (subtable) {
3978                         case FSF_SQ_CFDC_SUBTABLE_OS:
3979                         case FSF_SQ_CFDC_SUBTABLE_PORT_WWPN:
3980                         case FSF_SQ_CFDC_SUBTABLE_PORT_DID:
3981                         case FSF_SQ_CFDC_SUBTABLE_LUN:
3982                                 ZFCP_LOG_INFO("Access denied (%s rule %d)\n",
3983                                         zfcp_act_subtable_type[subtable], rule);
3984                                 break;
3985                         }
3986                 }
3987                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_access");
3988                 zfcp_erp_unit_access_denied(unit);
3989                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
3990                 break;
3991
3992         case FSF_DIRECTION_INDICATOR_NOT_VALID:
3993                 ZFCP_LOG_FLAGS(0, "FSF_DIRECTION_INDICATOR_NOT_VALID\n");
3994                 ZFCP_LOG_INFO("bug: Invalid data direction given for unit "
3995                               "0x%016Lx on port 0x%016Lx on adapter %s "
3996                               "(debug info %d)\n",
3997                               unit->fcp_lun,
3998                               unit->port->wwpn,
3999                               zfcp_get_busid_by_unit(unit),
4000                               fsf_req->qtcb->bottom.io.data_direction);
4001                 /* stop operation for this adapter */
4002                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4003                                  "fsf_s_dir_ind_nv");
4004                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4005                 zfcp_cmd_dbf_event_fsf("dirinv",
4006                                        fsf_req,
4007                                        &header->fsf_status_qual,
4008                                        sizeof (union fsf_status_qual));
4009                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4010                 break;
4011
4012         case FSF_CMND_LENGTH_NOT_VALID:
4013                 ZFCP_LOG_FLAGS(0, "FSF_CMND_LENGTH_NOT_VALID\n");
4014                 ZFCP_LOG_NORMAL
4015                     ("bug: An invalid control-data-block length field "
4016                      "was found in a command for unit 0x%016Lx on port "
4017                      "0x%016Lx on adapter %s " "(debug info %d)\n",
4018                      unit->fcp_lun, unit->port->wwpn,
4019                      zfcp_get_busid_by_unit(unit),
4020                      fsf_req->qtcb->bottom.io.fcp_cmnd_length);
4021                 /* stop operation for this adapter */
4022                 debug_text_event(fsf_req->adapter->erp_dbf, 0,
4023                                  "fsf_s_cmd_len_nv");
4024                 zfcp_erp_adapter_shutdown(unit->port->adapter, 0);
4025                 zfcp_cmd_dbf_event_fsf("cleninv",
4026                                        fsf_req,
4027                                        &header->fsf_status_qual,
4028                                        sizeof (union fsf_status_qual));
4029                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4030                 break;
4031
4032         case FSF_PORT_BOXED:
4033                 ZFCP_LOG_FLAGS(2, "FSF_PORT_BOXED\n");
4034                 ZFCP_LOG_DEBUG("The remote port 0x%016Lx on adapter %s "
4035                                "needs to be reopened\n",
4036                                unit->port->wwpn, zfcp_get_busid_by_unit(unit));
4037                 debug_text_event(fsf_req->adapter->erp_dbf, 2, "fsf_s_pboxed");
4038                 zfcp_erp_port_reopen(unit->port, 0);
4039                 zfcp_cmd_dbf_event_fsf("portbox", fsf_req,
4040                                        &header->fsf_status_qual,
4041                                        sizeof (union fsf_status_qual));
4042                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR |
4043                         ZFCP_STATUS_FSFREQ_RETRY;
4044                 break;
4045
4046         case FSF_LUN_BOXED:
4047                 ZFCP_LOG_FLAGS(0, "FSF_LUN_BOXED\n");
4048                 ZFCP_LOG_NORMAL("unit needs to be reopened (adapter %s, "
4049                                 "wwpn=0x%016Lx, fcp_lun=0x%016Lx)\n",
4050                                 zfcp_get_busid_by_unit(unit),
4051                                 unit->port->wwpn, unit->fcp_lun);
4052                 debug_text_event(fsf_req->adapter->erp_dbf, 1, "fsf_s_lboxed");
4053                 zfcp_erp_unit_reopen(unit, 0);
4054                 zfcp_cmd_dbf_event_fsf("unitbox", fsf_req,
4055                                        &header->fsf_status_qual,
4056                                        sizeof(union fsf_status_qual));
4057                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR
4058                         | ZFCP_STATUS_FSFREQ_RETRY;
4059                 break;
4060
4061         case FSF_ADAPTER_STATUS_AVAILABLE:
4062                 ZFCP_LOG_FLAGS(2, "FSF_ADAPTER_STATUS_AVAILABLE\n");
4063                 switch (header->fsf_status_qual.word[0]) {
4064                 case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE:
4065                         ZFCP_LOG_FLAGS(2,
4066                                        "FSF_SQ_INVOKE_LINK_TEST_PROCEDURE\n");
4067                         /* re-establish link to port */
4068                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
4069                                          "fsf_sq_ltest");
4070                         zfcp_erp_port_reopen(unit->port, 0);
4071                         zfcp_cmd_dbf_event_fsf(
4072                                 "sqltest",
4073                                 fsf_req,
4074                                 &header->fsf_status_qual,
4075                                 sizeof (union fsf_status_qual));
4076                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4077                         break;
4078                 case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED:
4079                         ZFCP_LOG_FLAGS(3,
4080                                        "FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED\n");
4081                         /* FIXME(hw) need proper specs for proper action */
4082                         /* let scsi stack deal with retries and escalation */
4083                         debug_text_event(fsf_req->adapter->erp_dbf, 1,
4084                                          "fsf_sq_ulp");
4085                         zfcp_cmd_dbf_event_fsf(
4086                                 "sqdeperp",
4087                                 fsf_req,
4088                                 &header->fsf_status_qual,
4089                                 sizeof (union fsf_status_qual));
4090                         fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4091                         break;
4092                 default:
4093                         /* FIXME: shall we consider this a successful transfer? */
4094                         ZFCP_LOG_NORMAL
4095                             ("bug: Wrong status qualifier 0x%x arrived.\n",
4096                              header->fsf_status_qual.word[0]);
4097                         debug_text_event(fsf_req->adapter->erp_dbf, 0,
4098                                          "fsf_sq_inval:");
4099                         debug_exception(fsf_req->adapter->erp_dbf, 0,
4100                                         &header->fsf_status_qual.word[0],
4101                                         sizeof(u32));
4102                         break;
4103                 }
4104                 break;
4105
4106         case FSF_GOOD:
4107                 ZFCP_LOG_FLAGS(3, "FSF_GOOD\n");
4108                 break;
4109
4110         case FSF_FCP_RSP_AVAILABLE:
4111                 ZFCP_LOG_FLAGS(2, "FSF_FCP_RSP_AVAILABLE\n");
4112                 break;
4113
4114         default:
4115                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_s_inval:");
4116                 debug_exception(fsf_req->adapter->erp_dbf, 0,
4117                                 &header->fsf_status, sizeof(u32));
4118                 break;
4119         }
4120
4121  skip_fsfstatus:
4122         if (fsf_req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT) {
4123                 retval =
4124                     zfcp_fsf_send_fcp_command_task_management_handler(fsf_req);
4125         } else {
4126                 retval = zfcp_fsf_send_fcp_command_task_handler(fsf_req);
4127         }
4128         return retval;
4129 }
4130
4131 /*
4132  * function:    zfcp_fsf_send_fcp_command_task_handler
4133  *
4134  * purpose:     evaluates FCP_RSP IU
4135  *
4136  * returns:
4137  */
4138 static int
4139 zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *fsf_req)
4140 {
4141         int retval = 0;
4142         struct scsi_cmnd *scpnt;
4143         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4144             &(fsf_req->qtcb->bottom.io.fcp_rsp);
4145         struct fcp_cmnd_iu *fcp_cmnd_iu = (struct fcp_cmnd_iu *)
4146             &(fsf_req->qtcb->bottom.io.fcp_cmnd);
4147         u32 sns_len;
4148         char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4149         unsigned long flags;
4150         struct zfcp_unit *unit = fsf_req->data.send_fcp_command_task.unit;
4151
4152         read_lock_irqsave(&fsf_req->adapter->abort_lock, flags);
4153         scpnt = fsf_req->data.send_fcp_command_task.scsi_cmnd;
4154         if (unlikely(!scpnt)) {
4155                 ZFCP_LOG_DEBUG
4156                     ("Command with fsf_req %p is not associated to "
4157                      "a scsi command anymore. Aborted?\n", fsf_req);
4158                 goto out;
4159         }
4160         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ABORTED)) {
4161                 /* FIXME: (design) mid-layer should handle DID_ABORT like
4162                  *        DID_SOFT_ERROR by retrying the request for devices
4163                  *        that allow retries.
4164                  */
4165                 ZFCP_LOG_DEBUG("Setting DID_SOFT_ERROR and SUGGEST_RETRY\n");
4166                 set_host_byte(&scpnt->result, DID_SOFT_ERROR);
4167                 set_driver_byte(&scpnt->result, SUGGEST_RETRY);
4168                 goto skip_fsfstatus;
4169         }
4170
4171         if (unlikely(fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
4172                 ZFCP_LOG_DEBUG("Setting DID_ERROR\n");
4173                 set_host_byte(&scpnt->result, DID_ERROR);
4174                 goto skip_fsfstatus;
4175         }
4176
4177         /* set message byte of result in SCSI command */
4178         scpnt->result |= COMMAND_COMPLETE << 8;
4179
4180         /*
4181          * copy SCSI status code of FCP_STATUS of FCP_RSP IU to status byte
4182          * of result in SCSI command
4183          */
4184         scpnt->result |= fcp_rsp_iu->scsi_status;
4185         if (unlikely(fcp_rsp_iu->scsi_status)) {
4186                 /* DEBUG */
4187                 ZFCP_LOG_DEBUG("status for SCSI Command:\n");
4188                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4189                               scpnt->cmnd, scpnt->cmd_len);
4190                 ZFCP_LOG_DEBUG("SCSI status code 0x%x\n",
4191                                 fcp_rsp_iu->scsi_status);
4192                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4193                               (void *) fcp_rsp_iu, sizeof (struct fcp_rsp_iu));
4194                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4195                               zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu),
4196                               fcp_rsp_iu->fcp_sns_len);
4197         }
4198
4199         /* check FCP_RSP_INFO */
4200         if (unlikely(fcp_rsp_iu->validity.bits.fcp_rsp_len_valid)) {
4201                 ZFCP_LOG_DEBUG("rsp_len is valid\n");
4202                 switch (fcp_rsp_info[3]) {
4203                 case RSP_CODE_GOOD:
4204                         ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4205                         /* ok, continue */
4206                         ZFCP_LOG_TRACE("no failure or Task Management "
4207                                        "Function complete\n");
4208                         set_host_byte(&scpnt->result, DID_OK);
4209                         break;
4210                 case RSP_CODE_LENGTH_MISMATCH:
4211                         ZFCP_LOG_FLAGS(0, "RSP_CODE_LENGTH_MISMATCH\n");
4212                         /* hardware bug */
4213                         ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4214                                         "that the fibrechannel protocol data "
4215                                         "length differs from the burst length. "
4216                                         "The problem occured on unit 0x%016Lx "
4217                                         "on port 0x%016Lx on adapter %s",
4218                                         unit->fcp_lun,
4219                                         unit->port->wwpn,
4220                                         zfcp_get_busid_by_unit(unit));
4221                         /* dump SCSI CDB as prepared by zfcp */
4222                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4223                                       (char *) &fsf_req->qtcb->
4224                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4225                         zfcp_cmd_dbf_event_fsf("clenmis", fsf_req, NULL, 0);
4226                         set_host_byte(&scpnt->result, DID_ERROR);
4227                         goto skip_fsfstatus;
4228                 case RSP_CODE_FIELD_INVALID:
4229                         ZFCP_LOG_FLAGS(0, "RSP_CODE_FIELD_INVALID\n");
4230                         /* driver or hardware bug */
4231                         ZFCP_LOG_NORMAL("bug: FCP response code indictates "
4232                                         "that the fibrechannel protocol data "
4233                                         "fields were incorrectly set up. "
4234                                         "The problem occured on the unit "
4235                                         "0x%016Lx on port 0x%016Lx on "
4236                                         "adapter %s",
4237                                         unit->fcp_lun,
4238                                         unit->port->wwpn,
4239                                         zfcp_get_busid_by_unit(unit));
4240                         /* dump SCSI CDB as prepared by zfcp */
4241                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4242                                       (char *) &fsf_req->qtcb->
4243                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4244                         set_host_byte(&scpnt->result, DID_ERROR);
4245                         zfcp_cmd_dbf_event_fsf("codeinv", fsf_req, NULL, 0);
4246                         goto skip_fsfstatus;
4247                 case RSP_CODE_RO_MISMATCH:
4248                         ZFCP_LOG_FLAGS(0, "RSP_CODE_RO_MISMATCH\n");
4249                         /* hardware bug */
4250                         ZFCP_LOG_NORMAL("bug: The FCP response code indicates "
4251                                         "that conflicting  values for the "
4252                                         "fibrechannel payload offset from the "
4253                                         "header were found. "
4254                                         "The problem occured on unit 0x%016Lx "
4255                                         "on port 0x%016Lx on adapter %s.\n",
4256                                         unit->fcp_lun,
4257                                         unit->port->wwpn,
4258                                         zfcp_get_busid_by_unit(unit));
4259                         /* dump SCSI CDB as prepared by zfcp */
4260                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4261                                       (char *) &fsf_req->qtcb->
4262                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4263                         zfcp_cmd_dbf_event_fsf("codemism", fsf_req, NULL, 0);
4264                         set_host_byte(&scpnt->result, DID_ERROR);
4265                         goto skip_fsfstatus;
4266                 default:
4267                         ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4268                                         "code was detected for a command. "
4269                                         "The problem occured on the unit "
4270                                         "0x%016Lx on port 0x%016Lx on "
4271                                         "adapter %s (debug info 0x%x)\n",
4272                                         unit->fcp_lun,
4273                                         unit->port->wwpn,
4274                                         zfcp_get_busid_by_unit(unit),
4275                                         fcp_rsp_info[3]);
4276                         /* dump SCSI CDB as prepared by zfcp */
4277                         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_DEBUG,
4278                                       (char *) &fsf_req->qtcb->
4279                                       bottom.io.fcp_cmnd, FSF_FCP_CMND_SIZE);
4280                         zfcp_cmd_dbf_event_fsf("undeffcp", fsf_req, NULL, 0);
4281                         set_host_byte(&scpnt->result, DID_ERROR);
4282                 }
4283         }
4284
4285         /* check for sense data */
4286         if (unlikely(fcp_rsp_iu->validity.bits.fcp_sns_len_valid)) {
4287                 sns_len = FSF_FCP_RSP_SIZE -
4288                     sizeof (struct fcp_rsp_iu) + fcp_rsp_iu->fcp_rsp_len;
4289                 ZFCP_LOG_TRACE("room for %i bytes sense data in QTCB\n",
4290                                sns_len);
4291                 sns_len = min(sns_len, (u32) SCSI_SENSE_BUFFERSIZE);
4292                 ZFCP_LOG_TRACE("room for %i bytes sense data in SCSI command\n",
4293                                SCSI_SENSE_BUFFERSIZE);
4294                 sns_len = min(sns_len, fcp_rsp_iu->fcp_sns_len);
4295                 ZFCP_LOG_TRACE("scpnt->result =0x%x, command was:\n",
4296                                scpnt->result);
4297                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4298                               (void *) &scpnt->cmnd, scpnt->cmd_len);
4299
4300                 ZFCP_LOG_TRACE("%i bytes sense data provided by FCP\n",
4301                                fcp_rsp_iu->fcp_sns_len);
4302                 memcpy(&scpnt->sense_buffer,
4303                        zfcp_get_fcp_sns_info_ptr(fcp_rsp_iu), sns_len);
4304                 ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE,
4305                               (void *) &scpnt->sense_buffer, sns_len);
4306         }
4307
4308         /* check for overrun */
4309         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_over)) {
4310                 ZFCP_LOG_INFO("A data overrun was detected for a command. "
4311                               "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4312                               "The response data length is "
4313                               "%d, the original length was %d.\n",
4314                               unit->fcp_lun,
4315                               unit->port->wwpn,
4316                               zfcp_get_busid_by_unit(unit),
4317                               fcp_rsp_iu->fcp_resid,
4318                               (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4319         }
4320
4321         /* check for underrun */
4322         if (unlikely(fcp_rsp_iu->validity.bits.fcp_resid_under)) {
4323                 ZFCP_LOG_DEBUG("A data underrun was detected for a command. "
4324                                "unit 0x%016Lx, port 0x%016Lx, adapter %s. "
4325                                "The response data length is "
4326                                "%d, the original length was %d.\n",
4327                                unit->fcp_lun,
4328                                unit->port->wwpn,
4329                                zfcp_get_busid_by_unit(unit),
4330                                fcp_rsp_iu->fcp_resid,
4331                                (int) zfcp_get_fcp_dl(fcp_cmnd_iu));
4332                 /*
4333                  * It may not have been possible to send all data and the
4334                  * underrun on send may already be in scpnt->resid, so it's add
4335                  * not equals in the below statement.
4336                  */
4337                 scpnt->resid += fcp_rsp_iu->fcp_resid;
4338                 ZFCP_LOG_TRACE("scpnt->resid=0x%x\n", scpnt->resid);
4339         }
4340
4341  skip_fsfstatus:
4342         ZFCP_LOG_DEBUG("scpnt->result =0x%x\n", scpnt->result);
4343
4344         zfcp_cmd_dbf_event_scsi("response", scpnt);
4345
4346         /* cleanup pointer (need this especially for abort) */
4347         scpnt->host_scribble = NULL;
4348
4349         /*
4350          * NOTE:
4351          * according to the outcome of a discussion on linux-scsi we
4352          * don't need to grab the io_request_lock here since we use
4353          * the new eh
4354          */
4355         /* always call back */
4356
4357         (scpnt->scsi_done) (scpnt);
4358
4359         /*
4360          * We must hold this lock until scsi_done has been called.
4361          * Otherwise we may call scsi_done after abort regarding this
4362          * command has completed.
4363          * Note: scsi_done must not block!
4364          */
4365  out:
4366         read_unlock_irqrestore(&fsf_req->adapter->abort_lock, flags);
4367         return retval;
4368 }
4369
4370 /*
4371  * function:    zfcp_fsf_send_fcp_command_task_management_handler
4372  *
4373  * purpose:     evaluates FCP_RSP IU
4374  *
4375  * returns:
4376  */
4377 static int
4378 zfcp_fsf_send_fcp_command_task_management_handler(struct zfcp_fsf_req *fsf_req)
4379 {
4380         int retval = 0;
4381         struct fcp_rsp_iu *fcp_rsp_iu = (struct fcp_rsp_iu *)
4382             &(fsf_req->qtcb->bottom.io.fcp_rsp);
4383         char *fcp_rsp_info = zfcp_get_fcp_rsp_info_ptr(fcp_rsp_iu);
4384         struct zfcp_unit *unit =
4385             fsf_req->data.send_fcp_command_task_management.unit;
4386
4387         del_timer(&fsf_req->adapter->scsi_er_timer);
4388         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4389                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4390                 goto skip_fsfstatus;
4391         }
4392
4393         /* check FCP_RSP_INFO */
4394         switch (fcp_rsp_info[3]) {
4395         case RSP_CODE_GOOD:
4396                 ZFCP_LOG_FLAGS(3, "RSP_CODE_GOOD\n");
4397                 /* ok, continue */
4398                 ZFCP_LOG_DEBUG("no failure or Task Management "
4399                                "Function complete\n");
4400                 break;
4401         case RSP_CODE_TASKMAN_UNSUPP:
4402                 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_UNSUPP\n");
4403                 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4404                                 "is not supported on the target device "
4405                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s\n ",
4406                                 unit->fcp_lun,
4407                                 unit->port->wwpn,
4408                                 zfcp_get_busid_by_unit(unit));
4409                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCNOTSUPP;
4410                 break;
4411         case RSP_CODE_TASKMAN_FAILED:
4412                 ZFCP_LOG_FLAGS(0, "RSP_CODE_TASKMAN_FAILED\n");
4413                 ZFCP_LOG_NORMAL("bug: A reuested task management function "
4414                                 "failed to complete successfully. "
4415                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s.\n",
4416                                 unit->fcp_lun,
4417                                 unit->port->wwpn,
4418                                 zfcp_get_busid_by_unit(unit));
4419                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4420                 break;
4421         default:
4422                 ZFCP_LOG_NORMAL("bug: An invalid FCP response "
4423                                 "code was detected for a command. "
4424                                 "unit 0x%016Lx, port 0x%016Lx, adapter %s "
4425                                 "(debug info 0x%x)\n",
4426                                 unit->fcp_lun,
4427                                 unit->port->wwpn,
4428                                 zfcp_get_busid_by_unit(unit),
4429                                 fcp_rsp_info[3]);
4430                 fsf_req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
4431         }
4432
4433       skip_fsfstatus:
4434         return retval;
4435 }
4436
4437
4438 /*
4439  * function:    zfcp_fsf_control_file
4440  *
4441  * purpose:     Initiator of the control file upload/download FSF requests
4442  *
4443  * returns:     0           - FSF request is successfuly created and queued
4444  *              -EOPNOTSUPP - The FCP adapter does not have Control File support
4445  *              -EINVAL     - Invalid direction specified
4446  *              -ENOMEM     - Insufficient memory
4447  *              -EPERM      - Cannot create FSF request or place it in QDIO queue
4448  */
4449 int
4450 zfcp_fsf_control_file(struct zfcp_adapter *adapter,
4451                       struct zfcp_fsf_req **fsf_req_ptr,
4452                       u32 fsf_command,
4453                       u32 option,
4454                       struct zfcp_sg_list *sg_list)
4455 {
4456         struct zfcp_fsf_req *fsf_req;
4457         struct fsf_qtcb_bottom_support *bottom;
4458         volatile struct qdio_buffer_element *sbale;
4459         struct timer_list *timer;
4460         unsigned long lock_flags;
4461         int req_flags = 0;
4462         int direction;
4463         int retval = 0;
4464
4465         if (!(adapter->supported_features & FSF_FEATURE_CFDC)) {
4466                 ZFCP_LOG_INFO("cfdc not supported (adapter %s)\n",
4467                               zfcp_get_busid_by_adapter(adapter));
4468                 retval = -EOPNOTSUPP;
4469                 goto out;
4470         }
4471
4472         switch (fsf_command) {
4473
4474         case FSF_QTCB_DOWNLOAD_CONTROL_FILE:
4475                 direction = SBAL_FLAGS0_TYPE_WRITE;
4476                 if ((option != FSF_CFDC_OPTION_FULL_ACCESS) &&
4477                     (option != FSF_CFDC_OPTION_RESTRICTED_ACCESS))
4478                         req_flags = ZFCP_WAIT_FOR_SBAL;
4479                 break;
4480
4481         case FSF_QTCB_UPLOAD_CONTROL_FILE:
4482                 direction = SBAL_FLAGS0_TYPE_READ;
4483                 break;
4484
4485         default:
4486                 ZFCP_LOG_INFO("Invalid FSF command code 0x%08x\n", fsf_command);
4487                 retval = -EINVAL;
4488                 goto out;
4489         }
4490
4491         timer = kmalloc(sizeof(struct timer_list), GFP_KERNEL);
4492         if (!timer) {
4493                 retval = -ENOMEM;
4494                 goto out;
4495         }
4496
4497         retval = zfcp_fsf_req_create(adapter, fsf_command, req_flags,
4498                                      NULL, &lock_flags, &fsf_req);
4499         if (retval < 0) {
4500                 ZFCP_LOG_INFO("error: Could not create FSF request for the "
4501                               "adapter %s\n",
4502                         zfcp_get_busid_by_adapter(adapter));
4503                 retval = -EPERM;
4504                 goto unlock_queue_lock;
4505         }
4506
4507         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4508         sbale[0].flags |= direction;
4509
4510         bottom = &fsf_req->qtcb->bottom.support;
4511         bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE;
4512         bottom->option = option;
4513
4514         if (sg_list->count > 0) {
4515                 int bytes;
4516
4517                 bytes = zfcp_qdio_sbals_from_sg(fsf_req, direction,
4518                                                 sg_list->sg, sg_list->count,
4519                                                 ZFCP_MAX_SBALS_PER_REQ);
4520                 if (bytes != ZFCP_CFDC_MAX_CONTROL_FILE_SIZE) {
4521                         ZFCP_LOG_INFO(
4522                                 "error: Could not create sufficient number of "
4523                                 "SBALS for an FSF request to the adapter %s\n",
4524                                 zfcp_get_busid_by_adapter(adapter));
4525                         retval = -ENOMEM;
4526                         goto free_fsf_req;
4527                 }
4528         } else
4529                 sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY;
4530
4531         init_timer(timer);
4532         timer->function = zfcp_fsf_request_timeout_handler;
4533         timer->data = (unsigned long) adapter;
4534         timer->expires = ZFCP_FSF_REQUEST_TIMEOUT;
4535
4536         retval = zfcp_fsf_req_send(fsf_req, timer);
4537         if (retval < 0) {
4538                 ZFCP_LOG_INFO("initiation of cfdc up/download failed"
4539                               "(adapter %s)\n",
4540                               zfcp_get_busid_by_adapter(adapter));
4541                 retval = -EPERM;
4542                 goto free_fsf_req;
4543         }
4544         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4545
4546         ZFCP_LOG_NORMAL("Control file %s FSF request has been sent to the "
4547                         "adapter %s\n",
4548                         fsf_command == FSF_QTCB_DOWNLOAD_CONTROL_FILE ?
4549                         "download" : "upload",
4550                         zfcp_get_busid_by_adapter(adapter));
4551
4552         wait_event(fsf_req->completion_wq,
4553                    fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4554
4555         *fsf_req_ptr = fsf_req;
4556         del_timer_sync(timer);
4557         goto free_timer;
4558
4559  free_fsf_req:
4560         zfcp_fsf_req_free(fsf_req);
4561  unlock_queue_lock:
4562         write_unlock_irqrestore(&adapter->request_queue.queue_lock, lock_flags);
4563  free_timer:
4564         kfree(timer);
4565  out:
4566         return retval;
4567 }
4568
4569
4570 /*
4571  * function:    zfcp_fsf_control_file_handler
4572  *
4573  * purpose:     Handler of the control file upload/download FSF requests
4574  *
4575  * returns:     0       - FSF request successfuly processed
4576  *              -EAGAIN - Operation has to be repeated because of a temporary problem
4577  *              -EACCES - There is no permission to execute an operation
4578  *              -EPERM  - The control file is not in a right format
4579  *              -EIO    - There is a problem with the FCP adapter
4580  *              -EINVAL - Invalid operation
4581  *              -EFAULT - User space memory I/O operation fault
4582  */
4583 static int
4584 zfcp_fsf_control_file_handler(struct zfcp_fsf_req *fsf_req)
4585 {
4586         struct zfcp_adapter *adapter = fsf_req->adapter;
4587         struct fsf_qtcb_header *header = &fsf_req->qtcb->header;
4588         struct fsf_qtcb_bottom_support *bottom = &fsf_req->qtcb->bottom.support;
4589         int retval = 0;
4590
4591         if (fsf_req->status & ZFCP_STATUS_FSFREQ_ERROR) {
4592                 retval = -EINVAL;
4593                 goto skip_fsfstatus;
4594         }
4595
4596         switch (header->fsf_status) {
4597
4598         case FSF_GOOD:
4599                 ZFCP_LOG_FLAGS(2, "FSF_GOOD\n");
4600                 ZFCP_LOG_NORMAL(
4601                         "The FSF request has been successfully completed "
4602                         "on the adapter %s\n",
4603                         zfcp_get_busid_by_adapter(adapter));
4604                 break;
4605
4606         case FSF_OPERATION_PARTIALLY_SUCCESSFUL:
4607                 ZFCP_LOG_FLAGS(2, "FSF_OPERATION_PARTIALLY_SUCCESSFUL\n");
4608                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE) {
4609                         switch (header->fsf_status_qual.word[0]) {
4610
4611                         case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE:
4612                                 ZFCP_LOG_NORMAL(
4613                                         "CFDC of the adapter %s could not "
4614                                         "be saved on the SE\n",
4615                                         zfcp_get_busid_by_adapter(adapter));
4616                                 break;
4617
4618                         case FSF_SQ_CFDC_COULD_NOT_HARDEN_ON_SE2:
4619                                 ZFCP_LOG_NORMAL(
4620                                         "CFDC of the adapter %s could not "
4621                                         "be copied to the secondary SE\n",
4622                                         zfcp_get_busid_by_adapter(adapter));
4623                                 break;
4624
4625                         default:
4626                                 ZFCP_LOG_NORMAL(
4627                                         "CFDC could not be hardened "
4628                                         "on the adapter %s\n",
4629                                         zfcp_get_busid_by_adapter(adapter));
4630                         }
4631                 }
4632                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4633                 retval = -EAGAIN;
4634                 break;
4635
4636         case FSF_AUTHORIZATION_FAILURE:
4637                 ZFCP_LOG_FLAGS(2, "FSF_AUTHORIZATION_FAILURE\n");
4638                 ZFCP_LOG_NORMAL(
4639                         "Adapter %s does not accept privileged commands\n",
4640                         zfcp_get_busid_by_adapter(adapter));
4641                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4642                 retval = -EACCES;
4643                 break;
4644
4645         case FSF_CFDC_ERROR_DETECTED:
4646                 ZFCP_LOG_FLAGS(2, "FSF_CFDC_ERROR_DETECTED\n");
4647                 ZFCP_LOG_NORMAL(
4648                         "Error at position %d in the CFDC, "
4649                         "CFDC is discarded by the adapter %s\n",
4650                         header->fsf_status_qual.word[0],
4651                         zfcp_get_busid_by_adapter(adapter));
4652                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4653                 retval = -EPERM;
4654                 break;
4655
4656         case FSF_CONTROL_FILE_UPDATE_ERROR:
4657                 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_UPDATE_ERROR\n");
4658                 ZFCP_LOG_NORMAL(
4659                         "Adapter %s cannot harden the control file, "
4660                         "file is discarded\n",
4661                         zfcp_get_busid_by_adapter(adapter));
4662                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4663                 retval = -EIO;
4664                 break;
4665
4666         case FSF_CONTROL_FILE_TOO_LARGE:
4667                 ZFCP_LOG_FLAGS(2, "FSF_CONTROL_FILE_TOO_LARGE\n");
4668                 ZFCP_LOG_NORMAL(
4669                         "Control file is too large, file is discarded "
4670                         "by the adapter %s\n",
4671                         zfcp_get_busid_by_adapter(adapter));
4672                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4673                 retval = -EIO;
4674                 break;
4675
4676         case FSF_ACCESS_CONFLICT_DETECTED:
4677                 ZFCP_LOG_FLAGS(2, "FSF_ACCESS_CONFLICT_DETECTED\n");
4678                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4679                         ZFCP_LOG_NORMAL(
4680                                 "CFDC has been discarded by the adapter %s, "
4681                                 "because activation would impact "
4682                                 "%d active connection(s)\n",
4683                                 zfcp_get_busid_by_adapter(adapter),
4684                                 header->fsf_status_qual.word[0]);
4685                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4686                 retval = -EIO;
4687                 break;
4688
4689         case FSF_CONFLICTS_OVERRULED:
4690                 ZFCP_LOG_FLAGS(2, "FSF_CONFLICTS_OVERRULED\n");
4691                 if (bottom->operation_subtype == FSF_CFDC_OPERATION_SUBTYPE)
4692                         ZFCP_LOG_NORMAL(
4693                                 "CFDC has been activated on the adapter %s, "
4694                                 "but activation has impacted "
4695                                 "%d active connection(s)\n",
4696                                 zfcp_get_busid_by_adapter(adapter),
4697                                 header->fsf_status_qual.word[0]);
4698                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4699                 retval = -EIO;
4700                 break;
4701
4702         case FSF_UNKNOWN_OP_SUBTYPE:
4703                 ZFCP_LOG_FLAGS(2, "FSF_UNKNOWN_OP_SUBTYPE\n");
4704                 ZFCP_LOG_NORMAL("unknown operation subtype (adapter: %s, "
4705                                 "op_subtype=0x%x)\n",
4706                                 zfcp_get_busid_by_adapter(adapter),
4707                                 bottom->operation_subtype);
4708                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4709                 retval = -EINVAL;
4710                 break;
4711
4712         case FSF_INVALID_COMMAND_OPTION:
4713                 ZFCP_LOG_FLAGS(2, "FSF_INVALID_COMMAND_OPTION\n");
4714                 ZFCP_LOG_NORMAL(
4715                         "Invalid option 0x%x has been specified "
4716                         "in QTCB bottom sent to the adapter %s\n",
4717                         bottom->option,
4718                         zfcp_get_busid_by_adapter(adapter));
4719                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4720                 retval = -EINVAL;
4721                 break;
4722
4723         default:
4724                 ZFCP_LOG_NORMAL(
4725                         "bug: An unknown/unexpected FSF status 0x%08x "
4726                         "was presented on the adapter %s\n",
4727                         header->fsf_status,
4728                         zfcp_get_busid_by_adapter(adapter));
4729                 debug_text_event(fsf_req->adapter->erp_dbf, 0, "fsf_sq_inval");
4730                 debug_exception(fsf_req->adapter->erp_dbf, 0,
4731                         &header->fsf_status_qual.word[0], sizeof(u32));
4732                 fsf_req->status |= ZFCP_STATUS_FSFREQ_ERROR;
4733                 retval = -EINVAL;
4734                 break;
4735         }
4736
4737 skip_fsfstatus:
4738         return retval;
4739 }
4740
4741
4742 /*
4743  * function:    zfcp_fsf_req_wait_and_cleanup
4744  *
4745  * purpose:
4746  *
4747  * FIXME(design): signal seems to be <0 !!!
4748  * returns:     0       - request completed (*status is valid), cleanup succ.
4749  *              <0      - request completed (*status is valid), cleanup failed
4750  *              >0      - signal which interrupted waiting (*status invalid),
4751  *                        request not completed, no cleanup
4752  *
4753  *              *status is a copy of status of completed fsf_req
4754  */
4755 int
4756 zfcp_fsf_req_wait_and_cleanup(struct zfcp_fsf_req *fsf_req,
4757                               int interruptible, u32 * status)
4758 {
4759         int retval = 0;
4760         int signal = 0;
4761
4762         if (interruptible) {
4763                 __wait_event_interruptible(fsf_req->completion_wq,
4764                                            fsf_req->status &
4765                                            ZFCP_STATUS_FSFREQ_COMPLETED,
4766                                            signal);
4767                 if (signal) {
4768                         ZFCP_LOG_DEBUG("Caught signal %i while waiting for the "
4769                                        "completion of the request at %p\n",
4770                                        signal, fsf_req);
4771                         retval = signal;
4772                         goto out;
4773                 }
4774         } else {
4775                 __wait_event(fsf_req->completion_wq,
4776                              fsf_req->status & ZFCP_STATUS_FSFREQ_COMPLETED);
4777         }
4778
4779         *status = fsf_req->status;
4780
4781         /* cleanup request */
4782         zfcp_fsf_req_cleanup(fsf_req);
4783  out:
4784         return retval;
4785 }
4786
4787 static inline int
4788 zfcp_fsf_req_sbal_check(unsigned long *flags,
4789                         struct zfcp_qdio_queue *queue, int needed)
4790 {
4791         write_lock_irqsave(&queue->queue_lock, *flags);
4792         if (likely(atomic_read(&queue->free_count) >= needed))
4793                 return 1;
4794         write_unlock_irqrestore(&queue->queue_lock, *flags);
4795         return 0;
4796 }
4797
4798 /*
4799  * set qtcb pointer in fsf_req and initialize QTCB
4800  */
4801 static inline void
4802 zfcp_fsf_req_qtcb_init(struct zfcp_fsf_req *fsf_req, u32 fsf_cmd)
4803 {
4804         if (likely(fsf_req->qtcb != NULL)) {
4805                 fsf_req->qtcb->prefix.req_id = (unsigned long)fsf_req;
4806                 fsf_req->qtcb->prefix.ulp_info = ZFCP_ULP_INFO_VERSION;
4807                 fsf_req->qtcb->prefix.qtcb_type = fsf_qtcb_type[fsf_cmd];
4808                 fsf_req->qtcb->prefix.qtcb_version = ZFCP_QTCB_VERSION;
4809                 fsf_req->qtcb->header.req_handle = (unsigned long)fsf_req;
4810                 fsf_req->qtcb->header.fsf_command = fsf_cmd;
4811         }
4812 }
4813
4814 /**
4815  * zfcp_fsf_req_sbal_get - try to get one SBAL in the request queue
4816  * @adapter: adapter for which request queue is examined
4817  * @req_flags: flags indicating whether to wait for needed SBAL or not
4818  * @lock_flags: lock_flags if queue_lock is taken
4819  * Return: 0 on success, otherwise -EIO, or -ERESTARTSYS
4820  * Locks: lock adapter->request_queue->queue_lock on success
4821  */
4822 static int
4823 zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter, int req_flags,
4824                       unsigned long *lock_flags)
4825 {
4826         long ret;
4827         struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4828
4829         if (unlikely(req_flags & ZFCP_WAIT_FOR_SBAL)) {
4830                 ret = wait_event_interruptible_timeout(adapter->request_wq,
4831                         zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1),
4832                                                        ZFCP_SBAL_TIMEOUT);
4833                 if (ret < 0)
4834                         return ret;
4835                 if (!ret)
4836                         return -EIO;
4837         } else if (!zfcp_fsf_req_sbal_check(lock_flags, req_queue, 1))
4838                 return -EIO;
4839
4840         return 0;
4841 }
4842
4843 /*
4844  * function:    zfcp_fsf_req_create
4845  *
4846  * purpose:     create an FSF request at the specified adapter and
4847  *              setup common fields
4848  *
4849  * returns:     -ENOMEM if there was insufficient memory for a request
4850  *              -EIO if no qdio buffers could be allocate to the request
4851  *              -EINVAL/-EPERM on bug conditions in req_dequeue
4852  *              0 in success
4853  *
4854  * note:        The created request is returned by reference.
4855  *
4856  * locks:       lock of concerned request queue must not be held,
4857  *              but is held on completion (write, irqsave)
4858  */
4859 int
4860 zfcp_fsf_req_create(struct zfcp_adapter *adapter, u32 fsf_cmd, int req_flags,
4861                     mempool_t *pool, unsigned long *lock_flags,
4862                     struct zfcp_fsf_req **fsf_req_p)
4863 {
4864         volatile struct qdio_buffer_element *sbale;
4865         struct zfcp_fsf_req *fsf_req = NULL;
4866         int ret = 0;
4867         struct zfcp_qdio_queue *req_queue = &adapter->request_queue;
4868
4869         /* allocate new FSF request */
4870         fsf_req = zfcp_fsf_req_alloc(pool, req_flags);
4871         if (unlikely(NULL == fsf_req)) {
4872                 ZFCP_LOG_DEBUG("error: Could not put an FSF request into"
4873                                "the outbound (send) queue.\n");
4874                 ret = -ENOMEM;
4875                 goto failed_fsf_req;
4876         }
4877
4878         zfcp_fsf_req_qtcb_init(fsf_req, fsf_cmd);
4879
4880         /* initialize waitqueue which may be used to wait on
4881            this request completion */
4882         init_waitqueue_head(&fsf_req->completion_wq);
4883
4884         ret = zfcp_fsf_req_sbal_get(adapter, req_flags, lock_flags);
4885         if(ret < 0) {
4886                 goto failed_sbals;
4887         }
4888
4889         /*
4890          * We hold queue_lock here. Check if QDIOUP is set and let request fail
4891          * if it is not set (see also *_open_qdio and *_close_qdio).
4892          */
4893
4894         if (!atomic_test_mask(ZFCP_STATUS_ADAPTER_QDIOUP, &adapter->status)) {
4895                 write_unlock_irqrestore(&req_queue->queue_lock, *lock_flags);
4896                 ret = -EIO;
4897                 goto failed_sbals;
4898         }
4899
4900         fsf_req->adapter = adapter;     /* pointer to "parent" adapter */
4901         fsf_req->fsf_command = fsf_cmd;
4902         fsf_req->sbal_number = 1;
4903         fsf_req->sbal_first = req_queue->free_index;
4904         fsf_req->sbal_curr = req_queue->free_index;
4905         fsf_req->sbale_curr = 1;
4906
4907         if (likely(req_flags & ZFCP_REQ_AUTO_CLEANUP)) {
4908                 fsf_req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
4909         }
4910
4911         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_curr, 0);
4912
4913         /* setup common SBALE fields */
4914         sbale[0].addr = fsf_req;
4915         sbale[0].flags |= SBAL_FLAGS0_COMMAND;
4916         if (likely(fsf_req->qtcb != NULL)) {
4917                 sbale[1].addr = (void *) fsf_req->qtcb;
4918                 sbale[1].length = sizeof(struct fsf_qtcb);
4919         }
4920
4921         ZFCP_LOG_TRACE("got %i free BUFFERs starting at index %i\n",
4922                        fsf_req->sbal_number, fsf_req->sbal_first);
4923
4924         goto success;
4925
4926  failed_sbals:
4927 /* dequeue new FSF request previously enqueued */
4928         zfcp_fsf_req_free(fsf_req);
4929         fsf_req = NULL;
4930
4931  failed_fsf_req:
4932         write_lock_irqsave(&req_queue->queue_lock, *lock_flags);
4933  success:
4934         *fsf_req_p = fsf_req;
4935         return ret;
4936 }
4937
4938 /*
4939  * function:    zfcp_fsf_req_send
4940  *
4941  * purpose:     start transfer of FSF request via QDIO
4942  *
4943  * returns:     0 - request transfer succesfully started
4944  *              !0 - start of request transfer failed
4945  */
4946 static int
4947 zfcp_fsf_req_send(struct zfcp_fsf_req *fsf_req, struct timer_list *timer)
4948 {
4949         struct zfcp_adapter *adapter;
4950         struct zfcp_qdio_queue *req_queue;
4951         volatile struct qdio_buffer_element *sbale;
4952         int new_distance_from_int;
4953         unsigned long flags;
4954         int inc_seq_no = 1;
4955         int retval = 0;
4956
4957         adapter = fsf_req->adapter;
4958         req_queue = &adapter->request_queue,
4959
4960
4961         /* FIXME(debug): remove it later */
4962         sbale = zfcp_qdio_sbale_req(fsf_req, fsf_req->sbal_first, 0);
4963         ZFCP_LOG_DEBUG("SBALE0 flags=0x%x\n", sbale[0].flags);
4964         ZFCP_LOG_TRACE("HEX DUMP OF SBALE1 PAYLOAD:\n");
4965         ZFCP_HEX_DUMP(ZFCP_LOG_LEVEL_TRACE, (char *) sbale[1].addr,
4966                       sbale[1].length);
4967
4968         /* set sequence counter in QTCB */
4969         if (likely(fsf_req->qtcb)) {
4970                 fsf_req->qtcb->prefix.req_seq_no = adapter->fsf_req_seq_no;
4971                 fsf_req->seq_no = adapter->fsf_req_seq_no;
4972                 ZFCP_LOG_TRACE("FSF request %p of adapter %s gets "
4973                                "FSF sequence counter value of %i\n",
4974                                fsf_req,
4975                                zfcp_get_busid_by_adapter(adapter),
4976                                fsf_req->qtcb->prefix.req_seq_no);
4977         } else
4978                 inc_seq_no = 0;
4979
4980         /* put allocated FSF request at list tail */
4981         write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
4982         list_add_tail(&fsf_req->list, &adapter->fsf_req_list_head);
4983         write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
4984
4985         /* figure out expiration time of timeout and start timeout */
4986         if (unlikely(timer)) {
4987                 timer->expires += jiffies;
4988                 add_timer(timer);
4989         }
4990
4991         ZFCP_LOG_TRACE("request queue of adapter %s: "
4992                        "next free SBAL is %i, %i free SBALs\n",
4993                        zfcp_get_busid_by_adapter(adapter),
4994                        req_queue->free_index,
4995                        atomic_read(&req_queue->free_count));
4996
4997         ZFCP_LOG_DEBUG("calling do_QDIO adapter %s, flags=0x%x, queue_no=%i, "
4998                        "index_in_queue=%i, count=%i, buffers=%p\n",
4999                        zfcp_get_busid_by_adapter(adapter),
5000                        QDIO_FLAG_SYNC_OUTPUT,
5001                        0, fsf_req->sbal_first, fsf_req->sbal_number,
5002                        &req_queue->buffer[fsf_req->sbal_first]);
5003
5004         /*
5005          * adjust the number of free SBALs in request queue as well as
5006          * position of first one
5007          */
5008         atomic_sub(fsf_req->sbal_number, &req_queue->free_count);
5009         ZFCP_LOG_TRACE("free_count=%d\n", atomic_read(&req_queue->free_count));
5010         req_queue->free_index += fsf_req->sbal_number;    /* increase */
5011         req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q;  /* wrap if needed */
5012         new_distance_from_int = zfcp_qdio_determine_pci(req_queue, fsf_req);
5013
5014         retval = do_QDIO(adapter->ccw_device,
5015                          QDIO_FLAG_SYNC_OUTPUT,
5016                          0, fsf_req->sbal_first, fsf_req->sbal_number, NULL);
5017
5018         if (unlikely(retval)) {
5019                 /* Queues are down..... */
5020                 retval = -EIO;
5021                 /*
5022                  * FIXME(potential race):
5023                  * timer might be expired (absolutely unlikely)
5024                  */
5025                 if (timer)
5026                         del_timer_sync(timer);
5027                 write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5028                 list_del(&fsf_req->list);
5029                 write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5030                 /*
5031                  * adjust the number of free SBALs in request queue as well as
5032                  * position of first one
5033                  */
5034                 zfcp_qdio_zero_sbals(req_queue->buffer,
5035                                      fsf_req->sbal_first, fsf_req->sbal_number);
5036                 atomic_add(fsf_req->sbal_number, &req_queue->free_count);
5037                 req_queue->free_index -= fsf_req->sbal_number;   /* increase */
5038                 req_queue->free_index += QDIO_MAX_BUFFERS_PER_Q;
5039                 req_queue->free_index %= QDIO_MAX_BUFFERS_PER_Q; /* wrap */
5040                 ZFCP_LOG_DEBUG
5041                         ("error: do_QDIO failed. Buffers could not be enqueued "
5042                          "to request queue.\n");
5043         } else {
5044                 req_queue->distance_from_int = new_distance_from_int;
5045                 /*
5046                  * increase FSF sequence counter -
5047                  * this must only be done for request successfully enqueued to
5048                  * QDIO this rejected requests may be cleaned up by calling
5049                  * routines  resulting in missing sequence counter values
5050                  * otherwise,
5051                  */
5052                 /* Don't increase for unsolicited status */
5053                 if (likely(inc_seq_no)) {
5054                         adapter->fsf_req_seq_no++;
5055                         ZFCP_LOG_TRACE
5056                             ("FSF sequence counter value of adapter %s "
5057                              "increased to %i\n",
5058                              zfcp_get_busid_by_adapter(adapter),
5059                              adapter->fsf_req_seq_no);
5060                 }
5061                 /* count FSF requests pending */
5062                 atomic_inc(&adapter->fsf_reqs_active);
5063         }
5064         return retval;
5065 }
5066
5067 /*
5068  * function:    zfcp_fsf_req_cleanup
5069  *
5070  * purpose:     cleans up an FSF request and removes it from the specified list
5071  *
5072  * returns:
5073  *
5074  * assumption:  no pending SB in SBALEs other than QTCB
5075  */
5076 void
5077 zfcp_fsf_req_cleanup(struct zfcp_fsf_req *fsf_req)
5078 {
5079         struct zfcp_adapter *adapter = fsf_req->adapter;
5080         unsigned long flags;
5081
5082         write_lock_irqsave(&adapter->fsf_req_list_lock, flags);
5083         list_del(&fsf_req->list);
5084         write_unlock_irqrestore(&adapter->fsf_req_list_lock, flags);
5085         zfcp_fsf_req_free(fsf_req);
5086 }
5087
5088 #undef ZFCP_LOG_AREA